On Android, I can install whatever I want, replace whatever I want. Hell, I can even install another App store if I wanted.
On iOS, you can't do any of that.
How is that not infinitely more anti-competitive? Somehow licensing software to other manufacturers makes you more anti-competitive then owning the entire pipeline?
I agree that IOS is way more anti-competitive. The problem is that anti-trust laws only take effect when some lawmaker defines something as a monopoly. In the android 5 billion dollar fine case, the EU used "percent of of smartphones running an OS" or more specifically, any OS that has >50% market share because the fine goes back to 2011 when android crossed the 50% threshold in the EU.