> If you aren’t mentally deranged or have a genetic disease you may pass on, it really is a mistake to skip having kids.

Jog on mate. There's a difference between "you won't regret them" and "it really is a mistake to skip having kids."

I know loads of older people without kids. Would their lives have had more meaning and fulfillment if they had them? Maybe, probably. But they are happy and content, living lives of meaning. As for your hobbies comment...seriously?