I don’t know why some want to be around in a post-apocalyptic world
Humans have a strong will to survive and we're great at adapting. I don't quite see what's so strange about it. If a plane crashes into ocean and I find myself on a deserted island I'd try to survive there too. Ofcourse in a post apocalyptic world there's no hope of help arriving but that doesn't really change anything for me. I find thinking about stuff like this fascinating and I'd absolutely build myself a "doomsday bunker" if I was a millionaire. Not because I believe or hope that day might arrive when I need it but simply just because it's kind of a hobby of mine.