It's quite simply put. You know when you attend a wrestling event you know something is different but you can't figure out what. All of a sudden you realize...OH SHIT, NO COMMENTARY! Now the live atmosphere of the crowd more than makes up for the otherwise awkward silence of a match. The commentary is indeed there to make the viewer at home feel something that you can only feel from being in the crowd, the commentary is there to convey that emotion to you as best as possible.