My preferred argument against the AI doom hypothesis is exactly this: it has 8 or so independent prerequisites with unknown probabilities. Since you multiply the probabilities of each prerequisite to get the overall probability, you end up with a relatively low overall probability even when the probability of each prerequisite is relatively high, and if just a few of the prerequisites have small probabilities, the overall probability basically can’t be anything other than very small.

Given this structure to the problem, if you find yourself espousing a p(doom) of 80%, you’re probably not thinking about the issue properly. If in 10 years some of those prerequisites have turned out to be true, then you can start getting worried and be justified about it. But from where we are now there’s just no way.