Speak for yourself please, “some” of us can still remember when we were not the born WoW professionals others profess to be, and therefore have no problem teaching /mentorind less capable /experienced players as a direct result.
As far as the difficulty goes in what is often referrered to as “nhc with 24 affixes”, usually IME by those toxic elitists that feel themselves above playing with less experienced players, the same sort of players that want to see people get banned as griefers for missing interrupts in M+ while they themselves often times can´t even clear a 10: Nobody is forcing any of us into the mode, and some of us actually welcome the change of pace because it shows how the other side lives, giving us insighty not avaiilable in our Organized group bubbles.
And I feel it is very much “our” problem, because “we” as a whole are WoW players. Just because someone doesn´t raid heroic or mythic or fails a mechanic or 2 in tourist mode doesn´t make tehm less deserving of our support or mean they should be denied the opportunity to learn.
With all due respect, for someone supposedly
you seem to have a peculiarly strong aversion to playing with people you don´t feel stack up to your own arbitrary standards and simply dismissing all players that engage with the mode as substandard and unmotivated players… many people post cataclysm wouldn´t be Heroic or Mythic raiders at all if LFR didn´t exist and better players, especially ones like ourselves closing in on 20 years of expereince, always simply assumed that they only want to troll themselves with intentional underperformance. 
Again, I personally would be fine with it, free mogs are always good… but sacrificing the experience of the majority because the minority thinks themselves above playing with them is IMO not the way to go in any game, online or off.
BTW as far as addons go: this is entirely because everyone is always looking for a silver bullet instead of learning their class and or the fight mechanics, usually due to people not wishing to properly advise them just throw out blanket statements like “copy the BiS list and skill tree from WoWhead” with no further information or help given, because ethat´s already too much effort invested in their mind.
Case in pooint I haven´t even had DBM installed since Shadowlands, and I only use a handful of WAs to track things not easily visible in the default UI, such as time anomaly combustion procs or when scorch execute is available, and that has not in any way hinderered me in achieving both AotC and KSM in every single season as well as killing a few mythic bosses when the Group I played with wished to progress to that level. Almost none of the mechanics of any encounter are new, they´re merely presented differently.
People constantly complain about bosses not telegraphing moves because they don´t want to make the effort of listen to the bosse’s voice lines or watch Mueh’Zala rear back one arm for half an eternity before filling the corresponding half of the room with slop you don’t want to get hit by. And that deveoopment itself is IMO primarily driven by the same elitist gatekeeping that forced them to look for an easy solution to begin with… “Just Download this weakaura pack and GSE,they play the game for your”, and then complaining about their poerformance… instead of simply speaking with them for 30 minutes about a game we supposedly all love, and should therefore at least theoretically enjoy teaching others to play 
It all feeds back into each other and shapes the overall community in some way, almost none of us or our actions take place in self -contained bubbles with no bearing on teh rest of the community… It can be as simple as not tellling someone to google how to get back to the Siren isle in /2, or as involved as taking a returning or new player under your wing every so often and explaining why class X does Y and not Z in Situation A but not B. 