How is scanning hashes of photos you upload to your cloud account going to give anyone the ability to stop you from downloading an app?

>Same tool is very handy if you hypothetically wanted to control spread of anything else, like anti ice apps for instance.

That's a weak argument because they can already do that today with google's play protect and apple's app notarization.

They already have one way of doing it therefore we should make a legal carve out to give them additional ways of doing it even though we don't want them to be able to in the first place.

That doesn't make sense. It's a defeatist attitude that serves only to advantage the opponent.