People have been saying "AMP prevents adblockers" since the introduction of AMP, and it has never been true. Advertisers don't want to bundle their ads with the content, they can't make any money that way. they want their ads to be dynamically requested each time they are drawn so they can sell ads based on real-time conditions. A standards-based implementation of AMP won't change this.

Brave's assertion that "bundles are like PDF" is actually a pretty good analogy - you don't see a whole lot of ad networks popping up trying to sell ad space in PDFs, do you?