It does seem like an odd choice, but so does carrying nuclear armaments because everyone else has them. I don't think the collapse of modern civilization wouldn't lead to nuclear war as countries escalate violence to try and fend other countries off of their resources. Not to mention the countless armaments that would likely fall out of governmental hands across the globe.

Honestly I bet nuclear apocalypse occurs before any of that. I'm thinking the climate crisis will set off wars that won't end well for anybody.