(Trying to deconstruct some thoughts here, so bear with me).
I wonder if it's part of the education in the USA where something like "voter suppression is happening in minority circles" is considered an extraordinary claim. And the rubric "extraordinary claim requires extraordinary proof" kicks in, where the party making the claim is then obligated to make the case for their claim.
Sadly, efforts to disenfranchise minority voters is not an extraordinary claim for most folks.