I can assure you I didn't think that - it was rather that I didn't think of any right-wing (or additional non left-wing) movements that significant numbers might plausibly belong to. But I definitely made a mistake in not trying to think of them more. If you can suggest some, I'll add them.

My predictions (linked in this comment ) did have few conservatives or libertarians. The set of EAs whose views I know contains a few libertarians and no conservatives. However that set contains disproportionately many elite university students, an unrepresentatively lefty group.

I was surprised that there weren't a few more libertarians and conservatives in the LessWrong census.