[This isn't a direct response to Mark, but a reply to encourage more responses]

To add another helpful framing, if you don't have children, but think as an adult part of your attraction to LessWrong was based on how your parents raised you with an appreciation with rationality, how did that go? Obvious caveats about how memories of childhood are unreliable and fuzzy, and personal perspectives on how your parents raised you will be biased.

I was raised by secular parents, who didn't in particular put a special emphasis on rationality when raising me, compared to other parents. However, for example, Julia and Jesse Galef have written on their blog of how their father raised them with rationality in mind.