I'd say 80% of artists are left leaning and it doesn't matter the art: music, theater, writing, painting, photography, etc.
This is also a reason why I usually don't care what artists have to say. Never follow my favorite artists on twitter or anything. I love hearing them talk about their work though. I enjoy their work and appreciate their opinions but when it becomes self righteous (most of the time it does) it's just a complete turnoff.
Same with athletes on not following them or really caring about what they have to say politically. Btw this goes for the left and the right too. It's more annoying to see a left wing artist/athlete blabbing about politics, but it's still cringe worthy to me when a conservative leaning artist/athlete blabs politically and I lean more that way.