I'm convinced they can't taste subtle flavors. The time negroes went apeshit over an Italian sportsball player and his son
eating quality pasta that wasn't buried in sauce showed they can't imagine the taste of semolina, olive oil and parmesan.
While I think burnt out tastebuds also play into it, we're forgetting the whole drama that started the Seasoning Americans thing; they fundamentally don't understand how seasonings work. They gave that cook on Tiktok shit because she "didn't use seasonings," but really she just wasn't using the dry powdered version of things that she already had in her recipe. She used onions and garlic instead of onion powder and garlic powder. "Seasonings," in the nigger mind, are just magical jars of dust that make food Valid™.
So parmesan, in Niggerville, isn't this:

it's THIS:

And the big problem there is it's cheap, so it's low quality, so it doesn't taste like shit compared to the "real" food. Have you ever had a real tomato someone grew in their garden? It has a flavor! Real, actual produce has flavor!!! "Fresh" produce from the grocery store is picked too early, ripened on a truck, touched by a hundred people and sprayed with god knows what. It barely has any flavor left after that, and anything that's canned or jarred has even less than that. So when a nigger makes spaghetti with store-bought boxed pasta, boiled in tap water from their shitass city well, covered in cheap jarred sauce, and dusted with 50 cent parmesan, it barely tastes like anything. So of course they fry their senses with spice and enough powdered seasoning to kill a horse, they almost have to, and then that creates a feedback loop where now they can't taste anything unless it has all that spice to begin with (which, as stated earlier, isn't really "seasoning" unless it's the cheap powdered crap that started this problem.) Shitass poor people food, spice burnout, and magical thinking all feed into the DIS AIN'T GOT NO SEEZNIN' thing.