Indeed, but the OP is not asking for there to be people who are racist, but rather that racist tropes about fictional creatures be integrated into the game rules so that the game is racist, as opposed to displaying people expressing racism, as it does now. These are two different levels. In other words: there is a difference between having characters express racist values, as it does now (Shadowheart using a racial slur "flatnose," the racism expressed against drow and tieflings) and the game actually making all of those races exactly like those racist tropes as the OP is requesting.
Hell,
I made a 3.5 homebrew race where the general trend of the members is to be racist against elves, dwarves, and half-orcs to varying degrees. But while they may think dwarves cursed by their goddess for improper breeding, that doesn't make that the truth behind dwarves. The OP is requesting that the racist trope that people hold be made definitive.