Just like Facebook doesn't care about ripped video's on their platform. They know that publishers won't bite the hand that feeds them. They know that they can use their power as the defacto gateway to the internet as there is no competition and noone powerful enough to stand up to landgrabs like this.
Maybe it's even worse. They don't stop and think about the power and influence they have, because over the years it has become entirely natural to them to just take whatever they want, repackage it and call it their own.
What comes first? Hen or egg? Google isn't the internet, the web was there long before Google made things findable. You had to know how and where to look. And yes Google made things back then way better.
Non the less without content on the web a search engine is just blank. Unnecessary imho.
So Google making my content a shared property is something of concern to me. Therefore I am not using AMP.