When I taught in public schools, the parents were very vocal about the material being taught and if they didn't like something that had been covered or some material they objected to. I have never heard anyone complain about what their kids are being taught, except for the new math. Parents can't understand it so they feel stupid, and I don't blame them.
I understand what the parents are going through with "new math" because I was using "new math" strategies before it was even discussed in schools. Went round and round with teachers, my parents and a bunch of other folks, because I couldn't explain to them how I was coming up with the answer, and they weren't interested in figuring it out either.
But, mathematics is not like any other subject in school because it isn't subjective at all., and it doesn't matter whether or not you like the answer.
Otherwise, a great deal of my personal friends are teachers, and they will even tell you they don't like the crap they are instructed to teach. But, most of them value their jobs, and wouldn't say a thing about it to anyone that mattered. The Progressives locked up the classroom years ago, and there is no reason to pretend that people agree with what is being taught when "most" (as you put it), will tell you different when they aren't pigeon-holed by Progressives.
It's possible you haven't heard anyone complain about what you are teaching, because to do so they would have to complain about what you are doing. In a society that attempts to get along for whatever purpose that may serve, people generally tend to avoid conflict. They hate seeing me walking down the hall, because I will tell them that if they have spent two extra hours a day, pulling a child out of regular classes to focus on reading, for 3 fricken years, and they are still trying to teach the kid to read the same stupid way they have for all of those years, then chances are the child is smarter than they are.
I'll speak up when parents don't want to, there is nothing the school can do to me, and I don't have a child they can take it on.