I’m not sure what you mean by saying that my Bayesian argument fails in some cases? ‘P(X|E)>P(X) if and only if P(E|X)>P(E|not-X)’ is a theorem in the probability calculus (assuming no probabilities with value zero or one). If the likelihood ratio of X given E is greater than one, then upon observing E you should rationally update towards X.
If you just mean that there are some values of X which do not explain the events of the last week, such that P(events of the last week | X) ≤ P(events of the last week | not-X), this is true but trivial. Your post was about cases where ‘this catastrophe is in line with X thing [critics] already believed’. In these cases, the rational thing to do is to update toward critics.
I partly agree with this, but I think the problem of ‘high-profile gatekeepers’ is much more serious, and that it would exist even in a largely monogamous movement which had the same professional/sexual overlap and the same (blatantly) deficient processes for responding to misconduct from high-profile members.
Put another way, your (b) is more important than your (a). And I can picture a quite idealised situation in which everyone is polyamorous, but they all obey good norms around flirting/displaying interest, and they all keep it strongly separated from money; and so the awful tit-for-tat funding/employment dynamics that have enabled harassment by EAs like Owen Cotton-Barratt don’t exist.
But I do agree that this is a pretty idealised situation, and not really achievable from where the EA community is right now. While it’s unfortunate, it’s also true that long-term relationships are often the main barrier stopping work life and professional life overlapping in these dangerous ways. Widespread polyamory gets rid of this barrier, and so introduces additional danger. Maybe, in an ideal world, the EA community could navigate around this danger; but this is not the ideal world, and after such blatant failures the community really needs to stop seeing itself in such an idealised and sanctified light. EA has failed to navigate these dangers in the past; if EAs stop thinking of their movement as fundamentally holier and analyse it in the same way they analyse any other social movement, they should not expect to be able to navigate them any better in the future. Polyamory might not be a massive priority compared to (say) massively overhauling safeguarding and reporting processes around misconduct; but it’s still important.