There's a whole culture that's grown up among the wealthy there around education. You won't get into an Ivy League school if you don't go to the "right" prep school. And you won't get into the "right" prep school if you don't go to the right pre-prep school. And so on and so forth -- right back to pre-kindergarten!
The parents feel trapped in the pipeline.
I live in this area. I know exactly what is going on. I visited this Waldorf School years ago.
There are many other fine private and public schools in the area. Going to the Waldorf School doesn’t guaranteed you entrance into an Ivy League, but it does guarantee that your child will have a hardcore sex education at an inappropriate age.
sex education in public and private schools are primarily for the deviants who are grooming your kids, it has no place in education