All I am saying is that if your business model is entirely based on market monopolisation, to the extent that spotify's model is... go f##$ yourself. Yes, Apple charges you a take-it-or-leave-it fee. Does that "makes apple effectively an owner of many businesses they shouldn't own?" Maybe. But if it does, then Spotify is an effective owner of Black Sabbath. Should Spotify own Black Sabbath?
In many industries, Google & FB are "effectively an owner." Without their advertising, many businesses can't function. Lots of startups, even established businesses have to advertise on adwords. Google can also takes a massive* cut.
Apple has all the best customers. You can't have a great online business without apple users. That's why Google pay Apple >$100bn pa to be their default search engine. Apple also do this to spotify. Spotify do it to music artists. They want to do it to podcasters.