I think there's a difference about knowing stuff about Overwatch and being passionated about Overwatch.
I think it have been proven past 2 years that majority of viewers don't give a damn about game analyzes. They are watching just for "meaningless" triple kills etc. even, if their team losses the map after that, because enemy team played smarter. For the record I would like to see some more deep analyze, but doesn't bother me too much. Most of the plays are pretty simple to figure out.
Also I believe there is some kind of demand to some kind of diversity in on-camera talent. Somewhat 20 years ago nobody really cared/noticed, if it was just 5 white guys talking about sports, but trend nowadays is to have more diverse staff in these kind of things. I just want to watch people who are having fun while talking about Overwatch - don't really care, what gender etc.-.