Hostile tribes will destroy your tribe and everyone in it, including you so people see preservation of their tribe as the pragmatic thing to do. It is an ancient arrangement.
Sebastian Junger in his book “Tribe: On Homecoming and Belonging” makes an interesting case for tribal societies being happier societies.
But then you didn’t exactly argue that there is virtue in the destructive quality of truth. Attacking the story is the path taken by Thomas Paine in “The Age of Reason”. Some think it good, others not so much.
I should mention that I like your article.