On today's news: British explorer Benedict Allen is missing in Papua New Guinea whilst searching for lost tribe.
AIBU that whilst I have sympathy for his family, nearest & dearest, another part of me has no sympathy at all.
The reason being, there seems to be a sense of entitlement that anyone should actively seek out a hitherto undiscovered tribe and for what? For their own glory? And how would this benefit this tribe who have probably been carrying on quite happily for years, with no need for the 'outside' world. After all, history has shown time and time again that for tribes which have been discovered and outed, the results for them have been catastrophic (slavery, land grabs etc just to mention two examples).
So I think if you are determined to explore and find lost tribes who may not wish to be found, you deserve what you get.