Edit: clarified about AMP usage and Google's involvement.
Google and Micorosft (Bing) have caches. I think Twitter does to (they definitely use AMP). Lots of other social media and other platforms use and highlight AMP content, and I think there are a couple other big players with caches, too.
It's definitely not just Google.
I can’t even use the JS from a local CDN.
In this case Apple is literally helping you and publishers not get screwed. I think you need to read up on AMP, because seeing the words 'standard technologies' and 'AMP' in the same comment in that way is extremely awkward.
I'm not getting screwed by AMP, and neither, AFAICT, are publishers.
I don't like how Apple unilaterally changes the way that things work (even if that means AMP) without regard to any other parties.
They have the biggest search engine by far. They have the most popular mobile OS by far.
But it's Apple you're mad at?
You can use exactly the same arguement you made against AMP, I don't see negating AMP as some great evil.
[1] or more charitably appealing to a subset of users at high cost to a non-trivial fractions of other users