Earlier quoted context omitted.
I'd say it's more about autonomy, self-sufficiency and freedom, rather than just "living primitive lives". Technological progress tends to stifle all of the above, in the grand scheme of things. Think about owning horses back in the day, which you could simply breed to get more of. You could travel freely pretty much anywhere, no roads required. Compare that to a car which is manufactured somewhere far away with tons…
>Think about owning horses back in the day, which you could simply breed to get more of. You could travel freely pretty much anywhere, no roads required. Compare that to a car which is manufactured somewhere far away with tons of special expertise and which basically cannot be repaired by a layman anymore (as opposed to not too many decades ago). And you rely on a huge infrastructure network for building and maintain…
Would've been easier had your example played out 10k years ago when there were still native horses in America. :)
For domesticating horses, it doesn't rely on huge factories. You need basic tools (stone would suffice) to cut down some trees in order to create an enclosure where you train the horses. Then basic tech like cloth and rope making, and/or leather, for making saddles and bridles etc. Nothing a couple of people can't cobble together with basic knowledge. No reliance on huge complicated factories and supply chains or tech unobtainable by resourceful people, locally.
For ships we've been building various boats for ages, with very simple tools. Building a small boat is something a single person can do in weeks to years depending on the size. And larger ones is mostly a question of adding more laborers (engineering calculations and considerations get more complicated with size so there are practical limits built in).
Making iron helps in both cases. That doesn't require a ton of technology either but granted it's quite difficult to bootstrap. Still, once up and running doesn't take more than a small community to maintain.
Ideally, in my mind, any "acceptable" tech should be manageable by a community of 150 people or less. I keep coming back to the Dunbar number whenever I think of human systems/societies.
Your questioning bring up an interesting comparison point:
Wood as building material vs. plastics. Wood being 100% recyclable plus it literally grows on trees, while plastics require immense knowledge and expertise in chemistry and raw materials include fossil fuels. The externalities for the latter are huge and will thus require an immense amount of interconnected people and technologies to create and maintain. Way more than 150.
I do also realize that there are edge cases where distinctions become difficult, but that's the case with everything. The main idea here is that I think technology should be judged on a spectrum of self-reliance/freedom. Defining a hard limit in the middle can be difficult (or impossible). Although, not impossible or necessarily even hard if the community of people deciding where the limit is is small enough.