So alot of imagined apocalypses are essentially power fantasies. The idea that some part of society is stopping you from actualizing some part of yourself. I occasionally imagine them too, the collapse of the state that wants to oppress me so that some other new non-oppressive state can emerge it's kinda a big part of revolutionary fantasy too.

It's just alot of writers want to actualize kinda crappy desires which honestly alienate me from the writers most of the time. Hence we get crappy apocalypse fantasies like zombie apocalypses. (A desire to indulge in righteous violence vindicating a gun fetishist while you consume as much as you can scavenge)