The horde cave, numbers

I honestly have no idea what you mean with this sentence.

It isn’t. The potential isn’t “lost”. It does indicate that you lost in the first clash and thus your collective PvP “prowess” was inferior to the opponents’ collective PvP “prowess”, and that sets the pace for the BG thereafter.

Which is exactly what I said in the post you replied to. A BG is fundamentally decided by the ability to beat the opponents in the PvP encounters. It’s just that simple. It sets the pace and everything simply snowballs from there.
What affects this are things like shamans being better at offensive gameplay while paladins are better at defensive gameplay, and the collective gear average of your team, as well as class & role setup of the team. It all affects this outcome.

Basically you can ignore the claim that 20 people can get ressed at the same time in the horde cave unless you’ve seen it in the Alliance cave.

Well yes, evidently so, since it seems to be a community-wide attitude issue permeating the alliance side.

It’s not because of the map however, which seems to be the favorite go-to excuse these days.

Did you forget about racials already, or did you just give up on it? Which is equally as flawed of an argument stemming from a perception issue.