Since which brand of toothpaste you use or where you eat your hamburgers does little to affect your child's future, I don't think people get bent out of shape too much, but to even insinuate that they may not be doing the best they can for their children gets people's undies in quite a bunch - even if the insinuation is all in their minds.
Not to derail this topic, but coming from an organic foods minded person, people most definitely
get bent out of shape about that, too. Just because we eat organics, we must be insinuating that they are not doing the best they can for the health of their children. I am using this to prove a point...
I have come to believe that if I do anything unconventional that people see me as someone who thinks I am better than they or that I am weird or that I insinuate that they are not caring or whatever rationalization people need to make me inferior by comparison to themselves in their minds... and to be quite honest, we all do it. If we don't feel good about what we are doing, we probably would not be doing it and we know that we constantly make comparisons, if we are being honest.
However, public school is not a choice, not a decision made based on information! It just is something people do because it is just the thing to do. When parents talk about registering their child in pre-K or kindergarten, it is rare to fine one that actually did some research on the schools in the area and then chose a public school. We have school of choice where we are and it is still rare!