You can gain in your effectiveness as a politician from a wide acquaintance with the world and from a degree of independence that having some outside interests gives. ↗
If a musician wants to be an actor, everyone thinks that's pretty cool. But if an actor wants to play a song, even if they've been doing it for 40 years, that's bad news. ↗
Musicians always come off sounding a little bit pretentious, and a little bit... I don't know, hypocritical, from what they do, talking about strong issues. ↗