They know better than everyone what people watch. Apparently it's not profitable to do in-depth journalism. As someone else in this thread said, the bobble-head analysis is what people watched (past tense, because now they are the "legacy media").

I think it's strongly related to the market for "reaction videos" on youtube, or even the early-2000's VH1 shows where a famous/popular person would react to music videos. Perhaps people want to project their emotions onto an avatar?