This will sound moralistic, and I don't mean it that way, but I think this relates to our general lack of clear values as a society. With religion absent in many people's lives, not much has stepped in to take up the slack and say "what really matters is being a good person" or "what really matters is wisdom" or "what really matters is family". So we're left with the messages we ARE getting, which are from a combinat…
A lot of the nomad-entrepreneur / lifestyle-design / ISV / four-hour-work-week culture values time with family, for example, very highly, and is actively working toward prioritising that over work.
It's one of the reasons I like that culture. It's also one of the reasons I like HN, because there's a significant minority of those folk here.
Interestingly, this ties into your comment further down the thread:
"To me, it has always seemed like, if I had something figured out, that had made me happy, i would WANT to share it, if it could help others."
A lot of people in the above communities do exactly that - but they tend to subsequently get decried as con artists, snake oil salesmen, or whatever, by people who believe they're selling an impossible dream.
Of course, there are also some genuine snake-oil salesmen out there. But I've generally found the population is lower than is commonly assumed.