Where do you all get the impression that LW is intimidating?

I read the replies to the "Attention Lurkers" post.

I was surprised at what a strong theme it was, since I don't think LW is intimidating.

I should have said earlier that I do think maintaining the high quality of LW is important, and the plus side of "intimidating" is having people focused on improving rationality and actually working on it.

When someone says they're afraid to post, it's hard to tell whether they have an accurate understanding that they don't know enough to contribute or are habitually cautious about speaking up even if they do have something to contribute..