> The main thing that folks are hiding behind is the fear of being wrong in hindsight.

I'm not so sure that's true.

I can think of many other reasons people might want or even need to participate anonymously (e.g. to protect their job, or their future employability, or their relationships with others in the industry to name just a few off the top of my head.)

Further, some of the most insightful comments seem highly likely to come from people with one or more of these privacy needs.