He seems to make really conservative assumptions though, what do you think was unrealistic? I don't think its unrealistic for the u.s.a to not ban people from testing themselves early in the pandemic, for example.

Challenge trails seems obviously good and not unrealistic.

You mean not publishing the truth? No I think that's is bad, it's more difficult to counter vaccine skepticism when organizations are not public and transparent, at least I don't see any reason to think not.