There's always that whole historical impact thing.
Step 1: One group of people screws over another for generations.
Step 2: Conditions change and it's no longer so easy to get away with screwing over the other group of people, but lots of damage has already been done and the first group has gained significant advantages, often due to engaging in official illegal actions that they got away with as part of how they screwed the other group.
Step 3: The first group whines about how very unfair any and all actions to actually correct the wrongs done are. Like...
When a number of the disparities that you reference are fundamentally a result of said illegal actions, that's hardly some grand point you have there. It's not like it's actually hard to find evidence to those ends, either way. To
borrow a short list of general categories to touch on as examples - residential segregation, unfair lending practices and other barriers to home ownership and accumulating wealth, schools’ dependence on local property taxes, environmental injustice, biased policing and sentencing of men and boys of color, and voter suppression policies are all areas where systemic racism has very much come into play. Even if you wanted to pretend that it's not happening
now (which the Republican Party's actions have long shown to be a rather ridiculous assertion), the damage done wouldn't remotely vanish. Even if problems weren't ongoing, of course, wounds as massive as that would take a long time to actually heal and let matters return to a more natural equilibrium. When the wounds are being continually aggravated as they are, said healing is slowed or worse.
In a somewhat different direction, when a person or group espouses some principle
only when they think that invoking it will help them, there's something to be said about whether others have any reason to treat that as actually being sincere. Even more so when said group shows with their actions that principle after principle that they claimed to value are discardable at the drop of a hat.