Another thing about this subset of homesteaders* is that they are insistent--proud, even!--of doing things that are unsafe, and encouraging others to also do those things.
One example is canning dairy products (milk, butter, cheese). They'll show up in a canning group and say something like, "Look how I canned all this milk that the store was getting rid of this milk for 50 cents a gallon because it's the last day!"
Sane and responsible members of the group will say things like, "Dairy isn't safe for home canning; if you have fresh milk that you need to save for later, you can freeze it or make cheese!" And, "If you need shelf-stable milk you can buy powdered milk," or "You can dehydrate it at home, but you need a really good dehydrator, plenty of trays, and it takes forever; you're usually better off just buying it."
And then the person who just canned 20 quarts of botulism will start frothing at the mouth about how when the shit hits the fan--
And yeah, I'll grant that if grocery stores cease to exist, and you are entirely reliant for your winter survival on what you can put up during times of plenty, the risk-benefit analysis would be different. But in the actual world that we currently live in, it's false economy at best, and at worst a stupid flex that could end up killing somebody.
Anyway, TL;DR, "simple" often refers to an imagined past when the problems of modernity did not exist--yet somehow, the problems of that era have been left behind--which in turn is often a racist dogwhistle.
(*Besides their substantial overlap with weapons stockpilers/"militia" types.)