I can agree with a lot you're saying, but it comes down again to preference.
I don't own F.A, nor do I desire to own one, if I did then a B.C woul be on it.
I knew about the B.C WAY before I ever decided to put one on, I always wanted good shooting fundamentals so I could notice it. I think a lot of guys think that it makes them a better shooter which is completely false for obvious reasons, I also watch a lot of guys slapping the trigger and losing good fundamentals thinking its gonna compensate for it.
As far as shooting in a hallway goes, that's the last place I would want to be in an engagement an I'm pretty sure I would move, that of course, comes SECOND to the fact that if I WAS in a gunfight, my hearing would be the last thing I was thinking of. I'll just rely on our little friend "Auditory exclusion".
We don't know how one another shoots or what works best, it's preference, all I'm satin is I don't think we can discourage people from using different things simply because we're "uncomfortable" with it ourselves, we don't know the intended application.