All talk, no solutions from F-droid. What are they actually doing to solve it? Why not stand up their own vetting system? I'd love some technical solutions, instead this is just childish.

Solutions from F-Droid? There are none. Like they said, it's an unremovable system service.

By analogy, would complaining about any organization ridiculously more powerful than you (e.g. a government) without having a complete alternative ready to go also be "childish"?

Because as designed they have to live under whatever google puts into Android because they have inordinate control over the whole ecosystem? I'm not sure why or how you would possibly describe that as "childish".