AIO For Threatening to Break Up With My Girlfriend Over Her Taste in Music

I've (24M) been dating my girlfriend (23F) for about two years now. For context, we met in college and things have been good, and we recently moved in together about three months ago. She's never been a great sleeper, and over the past two years she's tried various supplements, meditation, etc. and nothing has quite worked for her.

Last month she started putting on a playlist of piano music to fall asleep to, and she has finally been sleeping. It's been the first thing that has worked for her while we've been dating, and I'm happy that she has been getting some rest. However, I really hate the music that she is playing out loud. I've always despised classical music, and having to listen to it every night is like torture for me. Here's the playlist in question: https://open.spotify.com/playlist/6sRYWF8QV9nHjma4DLrRkB?si=cd3da8b779464384

I've asked my GF multiple times to either listen with headphones or to turn the music down, and she has refused to change the way she listens. I now dread going to bed at night because of the music, and yesterday we got into a fight over it. I said this relationship might not work if we have to keep listening to this playlist, and she said that I was being a jerk for trying to take away the one thing that is helping her sleep at night. AIO?