I use spotify and netflix without going through apple, the former on my linux desktop, the latter additionally on my smart tv.
And I wouldn't have a problem with that in general, except it feels dirty to claim Apple are saints for graciously allowing apps like spotify to be sold on their platform. They're already being paid for doing so through phone sales. Leveraging the monopoly they hold over the ios app store against Spotify, one of their competitors, is exactly what antitrust legislation is designed to prevent.