That's true to a point, Mike, but I'd bet that those "Most Turners" you mention also all had clubs and/or mentors with some feedback and guidance on optimizing their forms. (Can't really get better at something you don't know or understand what is wrong with it) I suspect a C&C from experienced turners (that may also have some experience or practice at critiquing) would be a huge help to those of us without nearby accessible clubs or mentors.
I DO notice improvements in my turning results this year over last year's items, HOWEVER, I still think I need more guidance on form & function - Call it "having vision" perhaps - My vision is limited by what I know (after just about 2 years of practice) and *I* for one think my form , or lack of form thereof , still needs a lot of work, Put it this way - My bowls and other turned objects, while I may be able to get a great finish and nice final cuts with minimal sanding, once they are completed, they still don't LOOK right to me, and I can't quite put my finger on WHY they don't look right. That's where C&C comes in.
For me, to get "local" expertise, I could visit Bill Blasic for example, but that's a 4 - plus hour drive one way.. or I could visit LAW downstate, but that's another 5 plus hours one way.... this past spring I went over the member directory and I count a total of 3 total AAW members within any sort of relatively reasonable travel time of me (and far as I can tell none of them are exactly active locally) - I personally know one other turner - and he isn't in AAW (we often go to the same farmer's market) and looking at his work, I see little difference in his and mine (Still something don't look right, in other words..) so couldn't exactly ask him, could I?
Upshot is, It is hard to fix what's wrong when you can't identify WHAT it is that is wrong.... so a C&C forum would be a highly welcome addition for some of us.
I do understand (entirely) the potential for negative or undesirable consequences of such a forum open to critique by the general membership, however, so Bill's point is well taken.. OTOH if there were some way possible a C&C forum could be made to work (privilege tweaks perhaps so anyone can post an initial post with image but only approved members can respond, or something like that..) , then I'd definitely be making use of it with every piece I think I've got "close, but it ain't looking right to me"