Have you read the comment sections on right wing blogs? Mostly awful.

The average comment isn't too great on LW either.

We have recieved substantial feedback via that mechanism already.

And whatever feedback you have received, you would have received even more feedback. Nupedia vs Wikipedia - wait, is that example so excellent that you don't even know what Nupedia is? Closer to home, then: OB published everything sent to it, yet Eliezer discovered when LW was turned on that this 'trivial inconvenience' was inhibiting countless posts and submissions.

For example, I've told you on IRC how I think the tribalism post is bullshit, but I have zero interest in writing up an email and sending it off and the email either never being seen or at best quoted.

The letters to the editor system is superior to moderated comments when it comes to optimizing for high signal to noise ratio

And you've based this on careful experimentation, of course.