And while you're at it, when you write and perform a song and post it on Tik Tok or Youtube, do you still own it or have you sold the song to them for the service of distributing it? Are you sure? Did you read and understand every word in that service agreement you clicked "OK" on?
Back in the 60s nobody understood what they were signing. 18, 19, 20 year old kids with no comprehension what “ownership” means, how the entertainment industry works, or what all these words in the contracts mean. There have been a whole lot of lawsuits along the way. Hopefully newer generations have learned, or at least get better managers and have actual lawyers look at the contracts.