Too, you can shove Google into its own separate User from everything else and keep it locked down in an always on VPN or the like. You don’t owe it the primary user on your phone. You can even keep that user shutdown such that none of it runs until you explicitly switch over and run it.

GrapheneOS is pretty dang impressive.

I think you’re missing the point. You say you use FOSS apps for everything. Do you download them from F-Droid?

From the article:

The future of this elegant and proven system was put in jeopardy last month, when Google unilaterally decreed that Android developers everywhere in the world are going to be required to register centrally with Google. In addition to demanding payment of a registration fee and agreement to their (non-negotiable and ever-changing) terms and conditions, Google will also require the uploading of personally identifying documents, including government ID, by the authors of the software, as well as enumerating all the unique “application identifiers” for every app that is to be distributed by the registered developer.

The F-Droid project cannot require that developers register their apps through Google, but at the same time, we cannot “take over” the application identifiers for the open-source apps we distribute, as that would effectively seize exclusive distribution rights to those applications.

If it were to be put into effect, the developer registration decree will end the F-Droid project and other free/open-source app distribution sources as we know them today, and the world will be deprived of the safety and security of the catalog of thousands of apps that can be trusted and verified by any and all. F-Droid’s myriad users will be left adrift, with no means to install — or even update their existing installed — applications. (How many F-Droid users are there, exactly? We don’t know, because we don’t track users or have any registration: “No user accounts, by design”)