Too many people in radio (and other occupations, too, for that matter) take an "I'll sleep when I'm dead" approach to life and work. If they themselves don't take this attitude, you can bet their employers will do it for them! Problem is, this attitude and this "burning the candle at both ends" lifestyle will indeed lead to an early grave. Along the way, it might also include alcoholism, drug abuse, excessive smoking, a sedentary lifestyle (other than the "constantly on the go" mindset that radio seems to require from people), eating too much junk food, not eating a healthy diet, etc.
And yes, I think there is a parallel among musicians. Many of them do, indeed, "hope they die before they get old." Rock stars don't age well. Look at Keith Richards, if you can stand to! ;D Most of these guys want to die young, and be remembered as legends, rather than live too long and become Vegas lounge lizards, like Elton John has done, or record too many albums of cover songs, like Rod Stewart has done. Who would have ever thought that Rod Stewart and Barry Manilow would ever go after the same audience? ???