> The logic behind AMP goes like this: web developers suck at making fast websites, let's strip out all the stuff people don't need and cache it on our super-fast servers. Web developers don't suck at making fast websites. Publishers demand tons of ads and tracking scripts. If the person signing the paychecks wants the page to have 15MB of sketchy third-party JS, then the page will have 15MB of sketchy third-party JS…
I was asked by management to add Google Tag Manager to the company site. When I saw that GTM included 15-20 tracking scripts I told them that unfortunately we can't include it until we have ensured that all of them act in accordance with GDPR. Legal was involved and agreed. Marketing gave up.
You're technically correct, but people who write pay checks often can be argued with. They often don't want to be on record taking decisions which can cause issues, and legal typically don't want to sign of on including 15MB unknown scripts on your site accepting credit cards.