> Private school is about "who you grow up knowing" not merely a "better education".
Maybe at the very elite end, but I don't think that applies generally. No one's going to Catholic School (IIRC, the biggest single type of private school in the US) because of "who you grow up knowing," for instance.
That's not a counter-argument. If your child spends his entire childhood primarily knowing folks that share your religious views, he's going to be better at honoring those views as an adult. Ergo, as a parent that knows that, religious school promises a curated "who your children know" even if that "who"'s attributes are "my kind of religious" rather than "my kind of wealth".
...
but at least in my local area those two things overlap nigh-identically.