Oh, I would apply that to any number of things Apple integrated, for example dropbox/icloud drive.

Google does the same thing. Unfortunately, with the near zero marginal cost of software, I do not see any way around vertical integration unless the law started arbitrarily segregating businesses.

Also, Apple Music came out 5 years after Spotify, so it had a pretty healthy lead. But regardless, any non Apple vendor competing with Apple's bundled products is going to face an uphill battle.