I have heard a lot second-hand about Diversity and Comics. I haven’t paid close attention to him simply because American superhero comics aren’t my bag. In this particular video, he gets into the mechanics of how to write a good story, and why political correctness hampers that.
I see now why this guy is popular (and why he is hated so much by some writers and illustrators at Marvel). He really understands how stories work, and his criticisms are calm, incisive, and fair.