Most people do not care as long as they do not feel immediate negative consequences. Plus there is a certain pressure (social and economical) to use spyware for the benefit of some gigacorp. People need to have a certain mindset to value privacy and data sovereignty and be willing to take action

Is there a business angle to this? Perhaps it's more about continuing to actively establish an online presence which benefits them directly as musicians than supporting the platform.

I'm not writing that I agree with it, but I can at least understand it if it's more of a business move. You don't want to be late to the party if, for example, you're in the business of parties.

I think a lot of people don’t care, and a lot more people just have no idea what’s going on. You have to be hyper-aware of how your data could get farmed in order to prevent each new service from collecting it.

Unfortunately this is so true. Even my family believe that I'm weird just because I have brought this concern few times.

Most people don't care and don't understand the implications, and the convenience is too great to ignore.