We have been home educating our four kids. The oldest is 15, enjoys poetry, plays basketball competitively, likes to tinker with computers, reads history, does math, etc. He isn't handicapped by our abilities or knowledge because we provided him with tools to learn. We've made it clear that his education is ultimately his responsibility. It is his job to learn. We serve as mentors and facilitators by providing opportunity.
The other three are on the same trajectory. I understand that you essentially discounted HN parents as exceptions, but we are also part of a broader community and I see similar results with children whose parents have no clue as to what a HN is.
None of them know haskell, but the oldest is working through The Little Schemer.