This is nothing new.
And the radio is in the hands of such a lot of fools Tryin' to anaesthetise the way that you feel!
Elvis Costello, Radio, Radio, c. 1978.
It was obvious 25+ years ago. It's just really "in your face" today. I have hope that XM and the Internet will kill the "star-makin' machinery behind the popular song".
Surprised nobody mentioned Joni Mitchell. Okay, maybe she's more folk than rock, but she DID write Woodstock.