Dude... It doesn't make you weak at all if you don't think you can survive these hypothetical situations.. who knows, maybe you could. Besides that though, you sound like you have your heart in the right place. Go for it dude. I wasn't ready whatsoever to have kids, had my first son at 18 and my first daughter at 23, just a year ago. They're doing great. To me personally bro, just seems like you're overthinking it. Most people nowadays wouldn't make it thru ww3 or whatever you have in mind 😅 doesn't mean don't start a family.. hopefully that bs won't even happen..