No, buying an Apple device doesn't make the entire society worse, however supporting devices that take away control from their users does make the entire society worse.
After all that control doesn't disappear, it just moves to someone else's hands - and guess who has no say whose hands those will be.
I empathize with you. Certain products have network effects, and therefore, if you personally prefer product G to product A for whatever reason, the more people go with G instead of A, the more value you obtain.
As a result, people often have a lot of incentive to try to get other people to make the same choices they make. This explains a lot of the jousting over frameworks: The more people use the framework you use, the more bug fixes, the more talent you can hire, the more courses, books, and blog posts you can depend upon, &c.
Without agreeing with you that society as a whole is better off without Apple selling me a locked down device, I can certainly empathize with your desire for fewer people to make the choice I'm making.
After all that control doesn't disappear, it just moves to someone else's hands - and guess who has no say whose hands those will be.