> However, when it comes to publishing apps to the store,
This isn't about publishing apps to the Play Store. If that's all this was about, we wouldn't give a shit. The problem is that this applies to all stores, including third party stores like F-Droid, and any app that is installed independently of a store (as an apk file).
> Given the growing threat of such attacks, we need to find ways to mitigate them.
How about the growing threat of right-wing authoritarian control? How do we mitigate that when the only "free" platform is deciding the only way anybody can install any app on their phone is if that app's developer is officially and explicitly allowed by Google?
Hell, how long until those anti-porn groups turn their gaze from video games and Steam onto apps, then pressure MasterCard/Visa and in turn Google to revoke privileges from developers who make any app/game that's too "obscene" (according to completely arbitrary standards)?
There's such a massive tail of consequences that will follow and people are just "well, it's fine if it's about security". No. It's not. This is about arbitrary groups with whatever arbitrary bullshit ideology they might have being able to determine what apps are allowed to be made and installed on your phone. It's not fucking okay.