For the same reason the television announcers at a professional wrestling match describe the bout they are covering as "testy". It's all part of the illusion of a fake competition between two guys who work for the same sponsors, promoters, and owners. On stage in front of an audience, they are "testy", but backstage they are best buddies patting each other on the back for the show they just put on.Why Do Reporters Keep Describing the Debates as "Testy"?
Or, it often seems, to report on the dumbest/easiest aspect of actual news. The debate coverage has been almost entirely about "tone" and the impact on the horse race rather than the actual arguments any of the four men made. Foreign affairs have been abandoned because it's hard to cover (it's so far away, and many of those people don't speak English) and domestic affairs have been dumbed down because it's easier to talk about Biden laughing or Romney's energy than to actually cover what anybody said.
I don't know, ratings I guess.They said that the first debate was testy, then they said that the vice presidential debate debate was extremely testy, and now they're saying that the next debate will be even more testy! Why so testy, reporters?