Some black people seem to think black politicians are stupid and they aren't.Yep. Unfortunately, due to the electoral college and the locations of the demographics that vote Democrat, Democrats have to appeal to the center to win national elections. Republicans can just appeal to their base because whites are the majority. That's just a fact. "Black only" legislation would be a loser of an issue without a supermajority in both houses of congress.
I would bet that 100% of them want to pass something solely for black people but that's not the way our system is set up for better or worse.