I was once in a boring work presentation. The presenter was explaining in detail a concept that didn't really need more than a few sentences to get across. My mind started wandering to what I would do after the collapse. I imagined myself on a farm somewhere, with self-sufficiency and solar panels and an alarm system and a whole field of crops. I imagined how troubling that would be, because hungry people would come to take my crops. I would have an alarm system, but what I am supposed to do? I can't blame them because they're hungry, but I also can't just let them take my food. I imagined to myself this guy reaching for one of my tomatoes, and then me shooting a warning shot, and the tomato blowing up that he was reaching for, and his expression of shock.
I then remembered that I was in a work presentation with several minutes having gone by and I was supposed to be paying attention. I started listening again, and found out that the guy was still talking about the same concept as when I'd originally wandered off. I left that job pretty shortly after that.
I'm not saying I will necessarily be one of the people on a little farm somewhere; that part is maybe unrealistic -- but if you envisioned no people anywhere with little farms, I think that's equivalent to saying we're all gonna die. The food has to come from somewhere, and the current system of massive factory farms run by corporate behemoths is linked to the current economic and technological system beyond any realistic hope of decoupling I think.