Actually SCOTUS ruled three times that “Treaty Tribes have Rights, all others have mere privileges which can be revoked at any given time”.
Does not matter whether the Tribes are a ‘voting block’ or not. They have Special Rights not granted to others ie Non-Indians - you me black yellow white tan green.
Their Rights are specifically enshrined in the Constitution while ours are just mentioned in a general way - despite claims to the contrary. SCOTUS agrees.
Courts continually rule for the Tribes even to the point of overruling SCOTUS when the plaintiff cannot afford to re-bring the case before SCOTUS. The Special Rights and Special Masters status is not political rather it is a matter of law granted on a case by case basis which usually means always.
If those other tribes are Treaty Tribes, then they fall into the above category, else they are just a body under the BLM jurisdiction. There is a difference.
OTOH, President U.S. Grant was very sentimental and granted recognition to a Mission Band of the the Chumash in the 1870s who got a small acerage grant just west of Palm Springs off what is now I-10. There were no more than 30 in this tribe at the time. Today, they own a luxury hotel, gas station, shopping center and casino just off the freeway and are rolling in dough. Timing is everything!