Having said that, uBlock Origin, and I'm assuming other similar extensions, offer inline script filtering. The code being served has to have some common code since it's all coming from a single org. What is stopping a filter that includes a filter like this?
The issue obviously being that this still prevents DNS filters from blocking Google, which is equally a big issue. Assuming the scripts indeed have some common code that can be blocked, perhaps this is where we start crowdsource filters. Something that runs in the background, and inspects scripts, which then gets posted to a server, validated automatically, and then later served as a block list that anyone can download.
[0] https://github.com/uBlockOrigin/uBlock-issues/wiki/Inline-sc...