A) Not de-ranking sites that are large and slow
B) Asking them to run a bunch of unnecessary trackers (Google Analytics)
I've never used AMP, but it does sound like it is fast, and web-page bloat is indeed a problem. But adding another layer (which also just happens to make you more beholden to Google) isn't the right way to fix that problem, removing the bloated layers is.
https://webmasters.googleblog.com/2018/01/using-page-speed-i...
They don't weight it high it enough. The fact that it took until 2018 until they did that for mobile is telling enough.
B) GA is super lightweight compared to almost every other thing people put on their sites. I mean, it's the equivalent of one tiny image.
B) And? It doesn't matter how lightweight it is. It's still unnecessary.
The result is the same (you murdered somebody), but it very much matters if and how I was involved.
Who are you to decide if GA is unnecessary?