proof it is evil: a site that doesn't support amp but is as nimble/fast and have Datacenters with lower latency to their readers than google, will still be punished (on Google's serp) over a site that has a crap website but gave in onto amp.
I think it might be that the technical team behind the AMP has good intentions but they are so focused on the perf/UX that they can't see the bigger picture about creating walled gardens, punishing sites from outside it, and other confusing things.
It's not the first time you
could see that googlers live in a bubble and need a strong criticism from external world to see some problems. Google != Internet (though it's a big subset)