Maybe its just human nature to try and rationalize the world around them? (using whatever framework they have a available)
There should be more, not less, experiments in alternative ways of life. I wish there was a lot more examples because we desperately need to change some things and some people need to be first.
As a non-American I don't know much about amish and there could be atrocities I am unaware of, but from what little I know I have always respected Amish for daring to be different, and for living sustainable and not contributing to climate change.
If you trade their belief in God with increased CO2 emissions -- why would that be a rational change to their culture?
So who are really misdirected humans? I would say those who sacrifice the planet on the altar of numbers stored in computer systems in banks...
Reading tip for you is "Sapiens" of Harari. Don't worry, he's an atheist, but he may contribute a more nuanced view on the role of religion in human culture (and he names capitalism as a religion too).
I don't think the current nuclear doctrines are anywhere close to perfect or best possible. There is surely room for improvement. But I vehemently oppose more countries innovating on nuclear doctrine, because the average outcome of innovation is likely to be worse than the current equilibrium, for bystanders and innovators alike.
Medieval Europeans knew that the fallow-field system was imperfect, but many simultaneous experiments on alternatives would have led to famine, not viable alternatives. Careful experimentation in some monastery gardens is a good thing, but wagering everyone's supper on untested ideas isn't.
The same applies to our own civilization. Western capitalist culture has flaws aplenty. But this does not mean we should throw open the gates to every, or even any, alternative group that comes along.
Minorities are, well, in miniority. Noone is at any point waging "everyone's supper" by trying out alternative ways of farming within their small miniority. (Meanwhile the majority IS risking everyone's supper in some decades).
Nuclear is different from your other examples because the choices of a small minority can drastically affect the vast majority.
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