I’ve watched some here and there, but having to try to catch them when they stream has put me too much in the mind of old tv and catching shows when they air. Watching the recording afterward is maybe good for some white noise, but it’s clearly not the intended experience I think.
The most popular streamers aren’t popular because they are good at games, it’s because they are entertaining. The game might be used to draw people in, but it’s not really about the game itself.
I would say watching sports is about the game. No one is watching NFL because Madden was casting it (I know he’s gone, but I don’t know any famous sports casters/commentators).