Maybe....I don't have a dog in that fight. I don't really like or dislike Buffer; he just is what he is.
But "what he is" is a sideshow attraction that's part of the bigger show in his own right. People complaining about him "making it about him" are missing the point that when he's announcing, he's putting on a paid performance...in that moment, it actually is about him. By design.
If you want it all to be about the fighters, and wish he were more background, ok, cool...I can roll with that attitude. But that's clearly not what the people putting on the show want...he's just doing his job.