Apple's legal non-compliance cannot be justified by the existence of Android. Hence the lawsuit
Whatever gymnastics you need to do to not think that is on your own. The Supreme court is being pulled in due to a split opinion, but one federal court has already ruled it legal.
That's not breaking the law. Also "if you don't like it, don't buy it" is literally how the market works. If you don't agree with the software decisions by Apple, you can happily flock elsewhere.
The structure of the free market doesn't insulate monopolies or illegal items from being traded under the guise of choice. So don't keep pining on the existence of Android.
If you've lived under a rock, Apple banning an app from the app store can often be the death knell for the publisher, especially small ones. Stop pretending Apple isn't anti competitive on the app store
Don't like it? Don't buy an iPhone then. Nobody is holding a gun to your head to use iOS or the App Store. End of story.
There's a number of handsets for you to choose from that aren't Apple's.