I think you're probably right if we count more stuff as "high-quality thinking" than I was meaning to do. But if we're rather strict about what counts as high-quality, I think I'm right.

(Also I'll emphasize that I wasn't talking about insecurity in general, but being insecure to such an extent that one refrains from posting high-quality stuff to an anonymity-enabling website because of a fear of getting downvoted.)