I don't think I'll ever be a father in the literal sense. I personally think bringing a child into the world as I know it would be irresponsible for me, especially given the ways that the climate apocalypse is likely to continue to disrupt and worsen our future over my and its lifetime.
I recognize this is a cynical view of things, and it's not a view I project onto friends nor family. If having a kid gives you hope for the future, that's great! For me the idea of one doesn't.
I will very likely have pets in the future that I could be a father to. I'm also generally supportive of the ideas of found families, and maybe someday I could be a father-figure without literally being one. I could see myself adopting or fostering once I got into a comfortable enough position to be able to handle the added stress of caring for another human.
There's something more righteous for my internal beliefs in trying to help those who are already stuck here make positive change and/or survive, but it is distinctly different from creating a new being who will have to grapple with those issues.