The guy seems to really miss the point. You don't go to shows just to listen to the music. You go to shows to support the bands, sing along with other fans and experience the whole performance. But anyone who just wants to "hear the live music" can buy the dvd and get the same thing that way.

I mean like, 95% of live albums are vastly inferior to the studio versions. If you're just going to listen to music, you almost always want a studio recording. The reason people prefer live music is that it offers a better context to experience the music in, not that it actually sounds better.