As do I. But there is still a segment of customers for whom you could explain the problem & demonstrate the effect, and they would still decline to accommodate a larger center.I don't know. It's easy to say "well a normal person will never notice this stuff", and it's true that they won't be able to EXPLAIN the problem, but... complaints about center channels and poor/unintelligible dialogue are the #1 complaint about home theatres that I've heard. And while it is sometimes the mix that is at fault, a lot of the time even known "poor mixes" like basically everything Christopher Nolan puts out, are mostly fine with a great center, even in very difficult rooms.
I generally steer friends towards the 3-way and coaxial(Kef) centers, which are available for reasonable prices. It's the main source of audio after all.