And yet I bet there are thousands of young people in Seattle having kids. These limits are all about what kind of life you want for yourself, and not about what is possible.
The parents at my kid’s daycare were in their late twenties / early thirties, had professional degrees (lawyers, physicians, tech) and only one kid in the daycare.
[edit to add this: I am talking from experience, it seems you are talking from hearsay]
It's possible, but if you do it in a developed country they'd take you to jail. Just like the law imposed a minimum wage, it also imposed a mandatory minimum standard of living.