Sure, but I think it's fair to say "why are you regulating us significantly more than you are regulating our similar competitor?" Android is already more open than iOS; you can already install third-party app stores, where the only hoop you have to jump is agreeing to a warning about installing things from "unknown sources".
But yeah, Google doesn't allow rival app stores to be distributed through the Play Store, nor does it give access to the full Play Store catalog to third-party app stores. Frankly I'd never even thought of the latter thing as something I or anyone would want, but sure, ok, make them do that.
Meanwhile, Apple gets to keep their App Store monopoly (in the US at least), a situation that is even more locked down than Android's has ever been.
I absolutely agree that Apple's platform needs to be opened up too. And while I'm often not sympathetic toward Google on a lot of things, I can absolutely be sympathetic toward them feeling like they are being treated vastly unequally by the law.