All of these are reasonable exceptions. My argument is less about "it's a duty" and more about "you don't know what you're missing out on." This is coming from someone who didn't think he wanted children. I would only argue against the people who are in a reasonable position to procreate, but believe they'd be better off without children. There's been a massive psyop against having children, particularly targeted against native Americans and Europeans. I'm just trying to convey that the psyop is a lie. Children are awesome, rewarding, and fun. They make life better, more enjoyable, and more meaningful. If you have reasonable means and genetics, I can guarantee you won't ever regret it.