But, some of the provisions kick into a higher level of scrutiny if the group asserting that they have been discriminated against by some practice or another has historically been the victim of discrimination or is a minority of voters in that state, so usually that is blacks and hispanics.
That said though, who knows man, maybe some day it will be the other way around and your grandkids will be very happy the VRA is on the books to protect them.
But, your point is still valid. If it favors Democrats, even if it has a noble purpose, that isn't fair. But, it isn't really clear that it favors Democrats. For example, nationwide, 95% of black voters voted for Obama, but only 43% of white voters. That means that very often, the best thing for the Democrats would actually be to spread the black voters around to a lot of white dominated districts where they could tip the scale for the Democrats. Instead of having 5 totally white districts vote for the Republican 57% to 43% and one totally black district that votes for the Democrat 95% to 5%, they would far prefer to have say 4 districts that were each 20% black, because then the Democrats would win all four instead of just one. Republicans actually are raising about the same number of voting rights act claims as democrats in the last 20 years or so.