This guy doesn't know what he's talking about. Certainly music theory can explain why music in the billboard 100 sounds good. That's all music theory does...it is a tool to label and describe structures of music, and explain why those structures harmonize or create dissonance.
Music theory is pretty universal and applicable today. Adam Neely did a very recent YouTube video on this subject. He talks about other ways of describing structures that they use in the east. However, it's not like the harmonic series, or modes, or SOMETHING from European music theory can't explain music from the eastern hemisphere.
The main thing that's racist is that most celebrated classical pieces are from Europeans. But that's because whites were wealthy and Africans really weren't. I don't think Africans that stayed in Africa and didn't become slaves documented their music. I could be wrong. Anyway, the fact that whites are disproportionately celebrated is due to their disproportionate dominance in documenting music throughout history. Kind of hard to call this racism. It's just fractions. What's racist is slavery and all that stuff that happened to keep black people disenfranchised.
Perhaps they should teach more about jazz if they don't. Idk how much they teach it in the average music theory curriculum in college. But if that's lacking, then I could see how that would be considered racist, although in that case I doubt the faculty are purposely trying to project superiority over minorities.
Now this guy knows what he's talking about. Nicely done.