> These beliefs can make it difficult to care about much of anything else: what good is it to be a nurse or a notary or a novelist, if humanity is about to go extinct?
Replace AGI causing extinction with the Rapture and you get a lot of US Christian fundamentalists. They often reject addressing problems in the environment, economy, society, etc. because the Rapture will happen any moment now. Some people just end up stuck in a belief about something catastrophic (in the case of the Rapture, catastrophic for those left behind but not those raptured) and they can't get it out of their head. For individuals who've dealt with anxiety disorder, catastrophizing is something you learn to deal with (and hopefully stop doing), but these folks find a community that reinforces the belief about the pending catastrophe(s) and so they never get out of the doom loop.