Well, for some of us, music is what's RECORDED, not live shoes.
I can accept: "well, too bad, traditional recording profits are dwindling, just man it".
But, "it's no problem, just give live shows" is a stupid answer. At best, it's a non general enough one.
All those articles and blog posts hammering on the "make money by playing live shows" theme, feel to my European tastes as written by Texan rednecks, whose idea of music is Willie Nelson or something... (and DMB is not that far off).
It's 2011: there are tons of groups, music genres etc where it doesn't make sense to have traditional concerts. And there artistis that don't like to give them, anyways. Not all musicians want to be onstage, especially in electronica, ambient, etc genres. Heck, even the Beatles got bored and stopped playing live mid-career. Oh, and "selling t-shirts and merchandise"? Some people want to be in the MUSIC business, not that of Matel and Threadless.