That’s the point, there is no competition to harm as there are no competing operating systems! Apple can only compete with google in the operating system market because there are no other competitors. That needs fixing.The issue is when that duopoly are able to use that poistion to harm competition.
Almost certainly to get to a level where you could lay a glove on Apple or Google. Its hypothetical, as soon as you became competitive they would crush you. VCs know this.