That said, I'll throw in my two cents here because it's as good a place as any. Though I have internal conflict on the whole issue of having children, I have to say that treating them as a means of investment for old age care has two issues - one, it seems kind of like a dick move to them, and two, it's far from guaranteed; they could have their own ideas.
Yes some parents would rather send thier kids to a private school and to be frank, we do, but that is a choice not a requirement.
I don't know any place where the only option for schooling is an expensive private school.
Saying that kids are not financial worth it, then constantly moving the goal posts to create a strawman to justify it is a waste of people's time.
If someone wants to argue that kids with special needs who require private schooling and a fully detached house in Palo Alto are expensive and a stretch to financially justify that is one thing but let's get a clear play field so that the goal posts are not constantly in flux.
Forgoing children is no guarantee of a luxury lifestyle nor grant you a luxury stay during your twilight years.