It's not like there is an abundance of quality wrestling announcers out there and someone is saying let's use these kids instead. I look at as I am paying to watch the matches, I don't pay for the commentary. Usually the tournament coverage early rounds (B1Gs, Soldier Solute, Midlands) don't even have commentary, just the arena sounds.
Plus, by using these kids its getting they get more announcers proficient at it and more people learning about wrestling. No one is going to be great their first time.
When the student broadcast first started, Nebraska had a terrible one that got made fun of on boards for his lack of knowledge, but the more student broadcast that happen the better the "kids" are getting.