To posit a different answer, some of us had kids well before we were bitten by the entrepreneurial bug.
At 35, I don't consider myself even remotely too old to still be doing things, and my daughter will turn 11 next month. That means that she was born about 11 years ago, and frankly, I had no clear idea of a career path above and beyond just working my way up the company ladder. It wasn't that it hadn't been done obviously, but the internet wasn't as prevalent 11 years ago, and there weren't near the resources then as there are now.
At 35, I don't consider myself even remotely too old to still be doing things, and my daughter will turn 11 next month. That means that she was born about 11 years ago, and frankly, I had no clear idea of a career path above and beyond just working my way up the company ladder. It wasn't that it hadn't been done obviously, but the internet wasn't as prevalent 11 years ago, and there weren't near the resources then as there are now.