Maybe you should read the DOJ suit against Apple. It's pretty clear that one reason (among many) that Apple is getting sued is because of abusive business practices exactly as I described.
Apple forcing Safari on iOS is present day, today, not 5 years ago (but it was also 5 years ago too, ever since there was an iOS webview). If Apple doesn't want to implement it, then they shouldn't force other browser makers to use their hobbled browser engine.