What are some logical reasons to have children?

Not trolling. I've been to r/childfree too many times. Their reasoning tends to claim that CF people have more time and money for themselves. This seems like a good deal (especially if I were the kind of person that likes having time to myself), but I haven't heard sound logical arguments for why having children is worth the time and money, probably because I haven't asked and because having children is so widely accepted. I plan on having children one day, but I'd still like to know some of the more solid arguments as to why it's worth sharing my life.

EDIT: Let's assume I'm not using my future kids for money.