I freaking hate this view.
For my oldest, he gets so many services through the public school that if we were to just take him out and put him in a private school:
1. We would have to find a private school that takes moderately functioning ASD kids--not low functioning, there are tons of private institutions for individuals with severe ASD, but a moderate case that needs things like social training, and specialized IEP goals to address his sensory and developmental difficulties.
2. This magic school needs to be in our price range.
Very few private schools will take kids that need IEPs. Their IEPs are federally required for individuals with disabilities, and though the private schools can get state therapists in the school for services, many don't like dealing with the hassle of this, and they really don't like kids like this bringing their scores down or taking up too much of the teacher's time. There's really no equivalent to the classroom and the services my son gets at a public school. Private schools are eager to take gifted students, but they do everything they can to try to avoid the other side of the SpEd coin.