Scott Alexander is a very careful quantifier of his bets, he tracks them year over year and always goes back to evaluate them and make sure he's well calibrated.

I take your point, but he is one of a very few people on this planet who would reliably say he just didn't know if that was a more accurate statement than what he said. The whole thing is not up in the air, there is limited but useful information available now, and he's trying to correctly integrate that.