Yes, they're pretty softcore by LessWrongian standards but places like this are where advanced rationalists are recruited from, so if someone is making a sincere effort in the direction of Traditional Rationality, it's worthwhile trying to avoid offending them when they make probability-theoretic errors.

(As an extreme example, a few weeks idly checking out RationalWiki led me to the quote at the top of this page and only a few months after that I was at SIAI.)