As someone who works in this space. A large org like Google often separates the feature work and counter abuse teams. The org structure leads to unintended feature consequences. It sucks when your trying to provide value to people and it's taken advantage of by bad actors.

I think the larger question is why are we all (or most of us?) still using Gmail? Why can't an average person host their own email server with open source software with straightforward security upgrades instead of trusting BigCo or the latest SmallCo?