It's interesting that one of the great things about the web is the promise of it distributed nature, and yet his prescribed 'fix' for misinformation sounds like the establishment of some sort of central authority to regulate content.
"We must push back against misinformation by encouraging gatekeepers such as Google and Facebook to continue their efforts to combat the problem, while avoiding the creation of any central bodies to decide what is “true” or not."
And who gets to decide who the gatekeepers are?
An oligopoly made up of elite companies is no better than a monopoly, especially when the members are demonstrably partisan.
This whole idea that we need some sort of authority to act as the Ministry of Truth is misguided.
You seem to keep coming back to this point, but the quote I gave before literally advocates the opposite of creating such an authority.
Kind of like the way to judge a person is how they treat those who are less fortunate, not how they treat their peers.
Moreover, in the world today, even cultures with broadly similar values such as the US and much of Europe often take very different views on this particular issue, which makes finding a reasonable consensus for a system that spans these different places... challenging.