I remember Alice Cooper well back in the early 1970s. I especially remember when the Million Dollar Babies album came out. Alice Cooper music and his stage act was very popular. I learned later on though that Alice Cooper wasn't into partying and doing drugs. His stage act persona was strictly business. He once commented on why Jim Morrison, who he was friends with, was destined to die. The reason, Alice said, was that Morrison couldn't separate his stage persona from his personal life. Still, what you said is generally true for rock stars. They'll listen to managers for promos because all they want is to sell records