Intra-indigenous cultural appropriation is now a thing

Ooh, an inter-cultural dust-up at the Indigenous Music Awards (IMAs)! Who'd a thought it?
Things got nasty after the most recent IMAs - surely an exclusivist, racist entity, by definition :) - when Cikwes (actually a Cree singer called Connie LeGrande) earned a nomination in the Folk Music category. Yes, Ms. LeGrande is indigenous, but her fatal mistake was to engage in throat singing, which apparently the Inuit have some sort of intellectual property copyright over. Inuit artists Tanya Tagaq, Kathleen Merritt, Nancy Mike, Piqsiq and Riit have all announced that they are boycotting the Awards in protest.
So, apparently this is a new category of intra-indigenous cultural appropriation, and my reaction to it is just as dismissive as it has been to most previous charges of cultural appropriation, whether it be white dudes singling blues or rap, white women writing about black or indigenous people, men writing about women, etc, etc. Can we not borrow without appropriating, etc, etc?
Maybe I shouldn't be so sarcastic and dismissive about it: these things are obviously hugely important to some people. I just can't help but think that Indigenous and Inuit artists (and for that matter, black artists, women artists, etc, etc) have much more important battles to fight, and should be using what energy, influence and clout they have (and I know this is probably very limited in the big scheme of things) for more significant problems.
Certainly, the rest of the world really doesn't know what to make it it. The Guardian talks about "self-appointed guardians licensing themselves as arbiters of the correct form of cultural borrowing".  The Wall Street Journal called it "reductio ad absurdam". These well-meaning people are running the risk of disappearing up their own asses, and making themselves a laughing stock in the process. It seems a shame.
But then, what do I know? I'm just a middle-aged white guy who couldn't throat sing if wanted to.