How you got all that out of people buying other than Colt/FN carbines is a puzzlement.
Pretty much. This means I need to buy a $1500 Kimber to have a real 1911, too, right?
Well then let me ask, if Bushmaster is just as good for $700 then why are they not in service with the troops?
No one is arguing that high-end ARs are above and beyond most of the domestic makes. The question is simply whether any given person
wants or needs the bells and whistles afforded by a Colt or similar, when they generally aren't firing high-pressure milspec ammo all day every day in 120-degree dust with baddies shooting back at them.
If your purposes are served by a little Toyota pickup, there's no need to buy a crew-cab F350 XLT "just in case." If you're looking for a semi-sporty commuter car, you can buy a Miata instead of a Corvette. If you still want to - fine. But that's a personal choice, as with all things.
99% of the ARs out there will work for 99% of shooters 99% of the time. There are at least a couple hundred thousand of them in civilian hands out there, and I'm willing to bet that most aren't Colt/FN/LMT.
I'd actually postulate a reversal on taliv's logic - the guys who buy Colt ARs, HK USPs and FN supertac shotguns all hung with lasers and holosights are the ones who generally seem to think that they are buying skill, and therefore have no need to practice. See for yourself - the forums are full of stock and lightly tricked guns with wear marks plainly evident, and pristine, unfired guns with accessories that are worth three times as much as the guns themselves.
I don't need practice, my $2000 gun is infallible! Besides, it might get scratched or something...