Maybe a stupid question but aren't the Amish essentially this thought process put into practice?
They aren't able to outcompete their neighbouring societies economically yet are in no way impoverished, and in many cases actually come out on top by many QOL/health metrics.
By the protection of the host society. It the Amish were an independent nation they would be conquered.
Don't romanticize the Amish, they have lots of issues including literal child sexual abuse and incest.
https://www.cosmopolitan.com/lifestyle/a30284631/amish-sexua...