Which is exactly why it killed off the rock band. And you picked the exact "artist" that is my prime exhibit for the argument; Madonna. So what's the name of Madonna's band? Who plays bass in that band? It became all about "me me me," the entertainment diva was born and music died. There are very few bands that play as a unit, and compose real music that can touch your soul, both with the words as well as the notes. The divas sing but say nothing.
No different than when you had "The Wrecking Crew" playing on virtually every hit song that came out of the 60s.