These isolated communities exist. Their quality of life is lower. But anyone can join them. From hippie communes to Amish communities, Luddism has a long tradition in modern society. (I’m ignoring the ethno-racial undertone in implying there can be an objective arbiter of what counts as true local cuisine and culture.)
https://www.investopedia.com/terms/c/comparativeadvantage.as...
What you have proposed is worse than what we have in every way. Transporting food and basic foods over long distances is cheap and very energy efficient. In fact it's more efficient than having a bunch of tiny factories in every city. People shouldn't be stuck living their whole lives in one place working for one company making shitty cloth or whatever.
https://news.ycombinator.com/newsguidelines.html
Edit: we've had to ask you about this many times:
https://news.ycombinator.com/item?id=30120252 (Jan 2022)
https://news.ycombinator.com/item?id=29598017 (Dec 2021)
https://news.ycombinator.com/item?id=25935223 (Jan 2021)
https://news.ycombinator.com/item?id=18774141 (Dec 2018)
https://news.ycombinator.com/item?id=16175756 (Jan 2018)
Could you please review https://news.ycombinator.com/newsguidelines.html and use HN in the intended spirit? We ban accounts that keep breaking them. I don't want to ban you, but we need you to fix this.