I think it's a kind of uncharitable article (surely Sam and the rest of the people involved have spent a ton of time thinking about the problem and the existence of black markets and possibilities for abuse), but

>I don’t know if it’s the best attempt but I understand what it is and what the goals are.

a bad solution can potentially be worse than no solution in this case. A false belief in identity guarantees can facilitate fraud and other manipulation, while "you should never trust anyone or anything, including that there's a 1:1 relationship between public keys and individual humans" at least advises everyone of the risk.