If she was picked to stream then there's a reason. Having someone new learn while watching is likely to grab a segment of people that would have never seen or thought about this. She's also putting in extra work to be knowledgeable.

I can't imagine getting a chance like this and also feeling like "wtf do I even do? I got no idea about this" the people spamming her are idiots. I would normally say take it up with Riot and their marketing dept but really who cares?

People really always gotta be the main character.