I’m failing to see in the article any sort of control for the whole “higher rate of liver failure” - that’s because of alcoholism. It says those accepted advance the same - but nothing about why others are rejected. If they’re rejected because they still don’t have their alcoholism under control, that’s the same treatment any other race would get.
Is it great? Hell no! Have native americans been dealt a shitty hand and is their tendency towards alcoholism due to society failing them? Absolutely. But being denied a liver transplant due to not being expected to take care of a new one is just standard fare. Solve the issues driving them to alcoholism, the liver transplant system is working fine.