Resurrection of the lost tribes is more important than whatever advantages it might gain for their members.
In Britain, those who paint themselves blue and put on animal skins as if they are ancient Celts are correctly regarded as a bit kooky. But they do so only as a leisure activity and do not assert a land claim to all of England.
As it is, the supposed members of the resurrected tribes live like lottery winners if they can and do not try to adopt a tribal lifestyle. In other words, the resurrected tribe is about the cash, not being a tribe in any meaningful sense.