Seems that way doesn't it? Look at history. Look at how people have lived for 20,000 years. In crisis, when the government fails (as it always does) neighbors take care of each other and survive. In today's world, there is so much diversity and pooled knowledge. In the communities I live in teamwork would start happening within hours. We would be rebuilding within a week. But if you live in an online world and never put down your cell phone maybe you don't know that this planet actually strives to provide for us? My friend, people have been thriving for a long time (literally forever except the last few years) without modern tech. And you think we can't live without it? Briefly? Shit. Besides, my neighborhood alone has enough knowledge to rebuild a society. We have farmers, gardner, engineers, soldiers, welders, carpenters, marijuana growers (medicine), leather workers, drunks, drug addicts, accountants, and even some old people that know just about everything.
When modern (or if, but it won't) modern society fails people will do what they always have. Get on with living. It will be a quick transition and honestly I think American society would emerge much healthier for it. An global EMP attack might be exactly what we need to break down the old power structures and allow all this new science a chance to put into action. I think everyone could agree a reset with clean energy and healthier food production lines would be good for the planet.
OK, yes lots and lots of people would suffer. Some would eat their children. Brother, that shit is happening right now somewhere in our world. Just because its a horrible idea to you, well I've seen both manmade and natural disasters that left thousands dead and millions homeless. And those that survived initially got on with living. Its often the still intact governments that fuck with the rebuilding process because the power that is wants things unchanged. Get rid of that power... freedom. I like freedom. A lot.
So maybe I'm short sighted... but maybe your hyperopia is ignoring what is in front of your face? But even if I'm wrong, it doesn't matter. Fun to debate though.