Interesting phenomena. Very insular communities such as the Hassidim and Amish do provide individuals with a sense of belonging, community and a very comfortable but extremely narrow niche. However the story of civilization and progress is also the story of detribalization. Individuals must detach themselves from the mundane regularity and comfort of the group and develop new ideas and things. Some do fail miserably and are lost. But those that succeed enhance us all.
“Individuals must detach themselves from the mundane regularity and comfort of the group and develop new ideas and things. “ I would only add that just because an idea is different or new does not make it correct. I think the problem with the insular community is that it has the potential to develop into a cult situation. If one is free to leave (without being ostracized and cut off) and choses to do so, then they should be wished well. I look at Islam and note that they kill those who leave. To declare someone a nonperson because they leave is cruel in the extreme.
God gave us brains for a reason.