I think my parents believed I had a gaming addiction for years when I actually just secretly listened to music and danced all night
Why wouldn't you just tell them what you were really doing?
I'd never tell anyone that.
There's nothing wrong with listening to music and dancing. You shouldn't have felt that was something you couldn't tell your parents.
It's fine. The secret was safe with me. My parents were just prudish in general about everything but gambling was better than having fun otherwise.
I can't understand why your parents thought music and dance was worse than gambling. They seemed to have their priorities messed up. But if you had to keep it a secret then so be it to keep the peace.