When the band begins to get a name for themselves, and the writers get assigned to bands, they'll hit somebody who just doesn't like that kind of music, or they love hip hop but hate guitar rock.
It is joyous for any actor to enter other grounds of consciousness and thought. At the end of the day, we just all like dressing up and playing around.
In film and television we are oftentimes so pampered that the truths are withheld.