Because they can't. My guitarist's wife who fronts a stoner rock band herself is also a pretty popular DJ on the big local Clearchannel radio station that plays a lot of the active rock stuff. She's always trying to squeeze or sneak in local rock bands or new stuff from national touring bands that aren't well known. People call the station and freak out. What is this crap, this is horrible, I want to hear Godsmack and ACDC don't even play this crap again. People get ANGRY. They don't want to hear new music. We're in the minority, folks. Just gotta accept that.