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 abo

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)