LW regulars are a diverse bunch. Though I have no evidence I am pretty sure some assign the probability of 1 to some priors.
Yes, I agree.
When you said that the problem with religions is that they tend to assign the probability of 1 to their priors, did you mean to include having some members who assign probability 1 to some priors in the category you were identifying as problematic?
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.