I have another friend who's a manager of 70 people at FANG, has 2 side companies. 2 kids at home. No idea how he does it.
I have another who works at FANG and from his facebook he seems to have have time for personal projects, and gaming, and guitar, and photography, while raising 3 kids.
One of my co-workers has 3 kids and yet managed to show off amazing side projects every 2-3 months.
I know several more.
I don't know what they do. I'm single and feel like I have time for nothing :P But it's clearly possible.
I know others that find a way to do fun stuff with their kids. In both sense. Some find kid friendly activities that they'd also enjoy. Being makers together for example. Others visit all their friends often and bring the kids. The kids are great and us friends love hanging out with them.