Because OBR is still functionally viable to play some of the most difficult content this game has available. You should not do 75% of your sim DPS by pressing 1 button over and over and pressing a cooldown once in a blue moon.
It’s an accessibility / casual feature and not for high end / challenge content in blizzard’s own words.
Keep in mind, according to Wowhead etc, the 25% damage penalty is from someone doing a FLAWLESS rotation, as in against a target dummy.
People who use this are not doing an optimal rotation, and in a hectic situation like m+, still wouldnt perform as good as on a target dummy, further increasing the damage penalty.
The game doesnt CC and interrupt for you, or use your long CD.
These people will continue being bad, and won’t progress further into hard content.
Only already skilled players will be able to use this in high end content, but casuals will still fumble in 2’s and 3’s.
Further exemplifying why it doesn’t need to perform as well as it does. It flatly should not be possible for someone of any skill level to automate their rotation into 1 button + maybe a cooldown and do challenging content.
Ion said they (Bliz) didn’t even want this thing being a viable expectation / option for heroic raiders in heroic raids. Yet it’s capable of far more than that tuned as is.
What challenging content are this able to do?
As of right now we’ve seen it be 95%+ of a player’s total actions in a timed +18 in which they matched the DPS of the other two players on trash and several bosses.
I don’t care if that player was good or not, that should not be possible.
Are those people already high skilled, or is it the average gamer not being able to do a +11 delve within an hour?
Why does it matter? You don’t tune specs around people who can’t play them either.
People using a tool badly isn’t an excuse.
Nobody should be timing 18s / doing sufficient DPS to kill heroic / early mythic raid bosses by pressing OBR for 95% of their inputs. Unless maybe they drastically over gear the content.
It matters everything.
You are complaining about pro people, probably people better than you, still outdoing what you are capable of by tremendously output.
Are they using their real rotation, or OBR badly? Which tool are we talking about here?
The peak of game popularity was back in wolk where you Had just 2 very easy dungeon difficulties.
Now we have what ? 20-30 and game is failing.
For a very good reason - most of players dont Play games - especialy RPG games for them to be so ultra challenging
OBR.
If pressing 1 button and the odd cooldown every 2 minutes is capable of sufficient DPS to time a +18 key, that is a problem whether the intended audience for obr can handle the other aspects of that content or not.
I don’t see what my rating has to do with this topic because there are many things that are fundamentally wrong with OBR.
I will link my post from another thread about this.
As it stands right now. LFR, Normal and Heroic Raid leaders will absolutely tell literally everybody to turn on OBR because it will make them perform better than executing a manual rotation which is not the intended purpose of the feature.
I think it’s clear by now, that people who use OBR do not pay attention to what buttons it’s using, they’re just mashing it and maybe pay attention to something else.
Therefore OBR does not encourage thinking, it replaces it.
Which, again, doesn’t matter in trivial content like leveling, world quests, LFR, etc. However when you reach more challenging content, you should know what you are doing.
If you let people use OBR for a month and then took it away, those players would be no better than when they just started playing.
Since OBR can only perform a DPS rotation, it has made the easiest role in the game even easier which has made tanking and healing comparatively more difficult than it was before.
What DPS player would even try to dip their toes into tanking or healing after they get used to OBR? The jump in difficulty will become completely unreasonable. So if you think the DPS queues are insufferable now, I can assure you it’s gonna get a lot worse.
Then this still goes down to a skill issue. Theres a 0.2 seconds GCD on the feature. If people are better with this than without, then people suck.
I am sorry, but this is a wake up call that people who think they are pros, are actually not that great at the game.
I’ve been playing with this feature for a few days now and I have to say: I quite like it.
It makes combat more relaxed.
It also allowed me to really clean up my main skillbar.
Blizzard did a good thing. 
Am I doing better or worse now? I don’t know. I don’t use any sort of performance meters. But ultimately I put my enjoyment and relaxation above performance. So I’m happy.
I really don’t think that the success of wotlk can atributed to 2 dungeon and raid difficulties.
Nobody is forcing you to play the game at the highest possible difficulty tho. If you want to progress the gear of your character you can stop at +10. You simply find the highest difficulty you can do and keep doing that as long you like it.
F. e. I have no issues admitting that Arena is too intense for me, I can’t get any rating there. So I get my PvP rating in Blitz because it’s easier.
It’s the same with the other parts of the endgame.
If you can’t kill Mythic bosses, you can kill them on Heroic, Normal or LFR. If you can’t do a +15, you can do a +5.
I have read a comment which said that “11.1.7 is going to be a very humbling patch.” And I think it has been.
Maybe we shouldn’t be tuning challenge content such that OBR rotations are sufficient to complete it.
You need to link some content where it is completed by people using only OBR
Is 95% of game actions being OBR not sufficient evidence?
Nono it is worse it is someone doing a flawless rotation like a robot
The feature is only about a 20-30% dps loss from a theoretical max dps output of your character as it stands right now.
Meaning if you are doing 70-80% of the maximum potential dps your character can do in any situation the obr is still better.
The feature is far to strong for what it is supposed to be in the game for.
It is supposed to be an accessibility feature say if you are missing an arm you can still play the game at an effective level.
It is not meant to be the optimal way for anyone to play the game that does not require the help.
it is not about get good, it is about what the feature is supposed to what reason it exist.
At the end of the day the goal for this feature is to sell more WoW subscriptions. So, if the silent majority ends up enjoying the game more because OBR is competitive, then that’s what the feature will be. Listening to a few very loud elitists who represent the worst parts of the game does not make financial sense.