I don't prep, FWIW, though I often think I ought to at least on some minimal "survive for a few weeks" level. I think I will finally look into that.
> obsessed
Do the smoke detectors and fire extinguisher(s) in your house mean you're "obsessed" with your house burning down?
There are degrees of prepping.
You could set yourself up to survive at least a few weeks "off the grid" with a few hundred bucks' worth of nonperishable food and water and shelter. That wouldn't get you through total societal collapse or a war, but it would get you through a lot of Hurricane Katrina-style disaster situations where help, in some form, is on the way but the food supply is disrupted. That's not obsession by any measure.
After that, yeah, things ramp up pretty quickly. If you're trying to survive a governmental collapse you need a pretty massive stash of food in order to survive months or years and if things go longer than that you'll need to start producing your own food at some point because AFAIK even MREs don't last forever.
Whether or not long-term doomsday survival is a realistic option or not, that's up for debate.
Being self-sufficient like a settler in the American West from the 1850s is absolutely not enough, not by a longshot, because if things collapse tomorrow in America there are going to be 350,000,000 million desperate people and some of them will be hostile... not exactly something they dealt with in Little House on the Prarie. A person would either need to stay completely hidden with a few years' worth of food stores, become a refugee, or.... I guess, band together with others in some sort of natural or man-made fortress. The latter option's a bit laughable unless you're truly dedicated to becoming a regional warlord with the biggest fortress/army in the region. (Good luck with that)