They wanted peace. Primarily what they were about. They settled simply because at the time of founding had more freedom than the feudalism they escaped from. Today the constitution has changed. There are far more laws and taxes. Their lifestyle is perhaps threaten more. Perhaps even existentially.

The same could be said for nations like Bhutan and Costa Rica and perhaps others which don't have an army per say.

Although I don't know enough about the Amish either but don't they oppose weapons. Supposedly violence although don't they employ corporal punishment?

They will always need to be under a protectorate. Because there simply isn't a globe with peace. As a nation they would be open to annihilation for any resources they settled on. Their lifestyle would distance themselves like an otherwise indigenous tribe sooner assimilated or destroyed. Although aren't there some Island communities similar to the Amish not quite as distanced from the rest of modern society but socially distanced from civilization. Falklands, Greenland. Eskimos in Canada. Laplanders in Finland, Russia. Tribes in Pakistan and Mongolia. Isn't there a very similar although more technological culture in the Atlantic on an Island with an active volcano, a completely isolated community.

Innovation into what. If we go back to the unibomber, remember the quote, the car lost us freedom, we are now bound by traffic and are forced into taxation. Same as electricity. Until some renewables have provided more self reliance often redundantly as they are an exploit because they are virtually unrepairable. Renewed at far greater increasing costs. None are environmental. Unlike a generator, or coal furnace, where with simple resources are easily self sufficient. Since the unibomber, we are now fully branded, today, look at these vaccine passports. Importantly an internet where we are enslaved until we don't even have free speech, we are bound by increasing rules. Not for our peace but for simple exploitation.