I'm a qualified nurse and I've always had a keen interest in nutrition - it's almost a hobby. But I've had times when I was unfit and overweight. Just because you have the knowledge does't mean that you have the self control to use it.
We are taught CW, and we are expected to educate our clients in CW. But we do talk about it in-house and I have heard many non-CW things being discussed in clinical settings between medical professionals. A dietician I used to work with often talked to me about the benefits of good quality fats, and this was long before I ever learned about primal. For the most part it all CW though and we all know that CW does't work.