Why do people not question things?

Lately, I have been thinking about and wondering why no one really thinks for themselves when it comes to (what I consider) important topics. If you tell someone you home-school your child, one of the first questions they ask you about is socialization. They ask you, "How will your child learn to live in the real world?" And they are SERIOUS. They don't  realize that our school system puts kids in a building all day, with a teacher standing in front of them telling them what they're going to do and not do, when they can go to the bathroom, when they can get a snack or a drink of water, when they can sharpen their pencils and it goes on and on and on. Their days are run by bells; bells ringing in all sorts of time intervals and they start and stop what they are working on 20 times a day. I take that back. 20 times within a 6 hour period. Their behavior is manipulated by comments like, "Wow! Look at the great job that Jane is doing, sitting so nicely!" or they are threatened with ludicrous things like, "If you don't get your work done, you'll have to stay inside for recess and finish it. And if you get done early, you can just sit there and read!" They don't even realize by doing that, they're making reading a punishment. Students in public school are only with kids who are born 6 months before or after them and THIS is what most people consider the REAL WORLD??? It makes my head explode. WHY do people not question things?