Of course, if they don't have access to antibiotics, they have other much worse kinds of sickness to deal with, and even their relatively simple lifestyle will be hard to maintain without hard work...
As I understand it, when corporate start setting up pineapple and sugar plantations in Hawaii they found they could not get cheap labor from the Hawaiian people themselves. And why would they? Between fish and fruit they have all the food they need. A simple structure (on the preferred side of the island) is all you need for shelter.
So they brought in Chinese laborers.
Also, tap water or at least a well.
During tje first year, children get like 20 or 25 vaccines. Some of the ilness are very rare and they may not know them, but other are just severe diarhea caused by a common bacteria. And add antibiotics for other common problems.
Go far enough into a forest and you'll likely be left alone when you build a primitive hut, except that now an hour of work buys you a lighter, a knife of unachievable quality, a pack of pills that save you from dying from infection, or "firewood" (a propane cartridge) for days.
There are very few places left in the world where that is true.
Governments basically all hate stateless people. There's been a long history of forcing "civilization" on stateless people "for their own good", but really it's because they can't be easily controlled or taxed.
I wonder how they feel finding out the rest of the world has some nasty infectious diseases and people there need to work their asses of for 30+ years to pay their mortgage and have a roof.