Why doesn’t these YouTubers talk about Anime in their channels

Can’t really comment on the other channels, but I don’t think Sargon really watches that much anime, if any at all. He’s become much more invested in discussing mainstream politics over the last five years, which is why he keeps his channel(s) focused on current issues. I believe he stated in one of his videos he believes there are plenty of great channels already tackling the culture war in media, so he largely leaves it to them. He probably just doesn’t want to chime in on a subject he’s not very familiar with. Assume it’s the same with the others.

Alex Meyers specifically said he won’t touch anime because anime fans are crazy. If you say anything the slightest bit negative the death threats start pouring in. Plus, frankly, they have bigger fish to fry.

Their main focus is pop culture in the states. There are also many western comics that are not Marvel and DC which rival anime. The Indie comic scene is still very well alive.