Maybe this is harsh but honestly, it feels like a lot of tribal enrollment requirements are actively punishing people for forced assimilation, especially when enrollment requires having an enrolled parent.
One generation is all it takes. One person who decides not to enroll for their own safety, who decides not to enroll their children for their safety, and enrollment is now permanently out of the reach of that family.
Idk, it just feels. . . cruel, I guess. Same with age cut offs. What are you supposed to do when your tribe's enrollment cut off is barely past adulthood but your parent(s) refused to enroll you or you didn't find out you weren't enrolled (or that it was even an option) until you were an adult? Are you just fucked forever?