But using electrical devices powered by batteries or generators or solar panels is fine in many of those communities because there are multiple suppliers of all of those (and in the case of generators for the fuel to power them).
I guess it's channeling https://www.biblegateway.com/passage/?search=John+17%3A15-16... ; transactions between english and amish are necessary (from being in the world) but to be minimised (not being of the world), whereas transactions between english or between amish don't count for flow across that boundary.
(too much rumination concerning flows across boundaries leads us across a different boundary: out of theology and into physical mathematics, eg https://en.wikipedia.org/wiki/Stokes%27_theorem#Maxwell's_eq... )
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Edit: unfortunately https://www.jstor.org/stable/44257359 (amish & tourism, 1997) is paywalled
see also https://en.wikipedia.org/wiki/Nonconformity_to_the_world#Bib...
For historical developments, see https://gameo.org/index.php?title=Nonconformity#Europe.2C_As...
For intersection with hippiedom, consider https://www.youtube.com/watch?v=6itauSnrSZA
After all, the number of transactions required to make even a pencil is astonishingly high, as Adam Smith pointed out two hundred years ago.