Being busy acts like a pacemaker. All people I know with big families don't have mid-life crisis. They do get overwhelmed at times. But most have some hobby or passion. Sports, cars, wood-making, or side projects. Kids make you realize time goes by. It's harder to accept life moving on if you are alone. And you are more likely to fall for negative habits. In general, of course there are outliers at both ends of the curve.

In old-style charities people with families are a majority. But the fashionable new and ephemeral NGOs are usually full of singles (mostly posing). Again, in general.

And I should listen to my own advise. You are right. I am just another guy and shouldn't give advice on life to complete strangers, on the internet. Good night.