AMP avoids all of that. It also brings security benefits by getting rid of basically every tag that can be used to mount attacks on the browser.
Also, it's been known for quite a long time that users like faster sites, resulting in much lower bounce rates. Was that not enough for you to optimize the hell out of your site? It's been my experience that in a lot of companies, it isn't enough. Marketing or publishing or whichever department can attach dollar amounts to the tracker or ad or whatever they want to add, and devs can only handwave around experience.
It's not a winning proposition.
It would be ridiculous to down-rank the exact thing the user is searching for just because the user would have to wait 800ms longer for that information. Or up-rank something the user isn't looking for just because it loads faster.
The best Google can do is bluff about how much perf matters.
It may just be unfounded cynicism on my part, but this does not sound like a better web experience. It sounds like the web circa 2009-2015. It sounds, to me, exactly like all the things we'd like to get away from with something less intrusive than AMP.