I personally struggle with the concept of being 'raw'.
I also wouldn't condemn nor dismiss it though.
For me there's a hazy middle ground that involves raw and cooked foods, that's personally where I currently aspire to be although I'll freely admit that I just don't partake in a salad as much as I should and up until my vegan lifestyle dragged me kicking and screaming, I did not eat enough fruits.
Where there is an argument for cooking;
1) Some foods which are the staples of peoples more in touch with nature than ourselves, are in fact poisonous. Processing of leaching these foods in water and then cooking them vastly reduces if not neutralising the toxic elements. This can't be said for all foods but starches I believe are where this becomes a necessity.
2) Cooking reduces water content and makes foods 'weaker', one would imagine that means we can eat more and digest easier thus gaining more nutrition per space filled over raw foods. Science indicates this to be true and I think we all know that tomatoes and but one food that's helpful nutrients become more potent when cooked. Countering this I would suspect that Flaxseed's omega 3's would be damaged by cooking but that's a gut feeling rather than what the evidence says.
3) It's perhaps subjective but I personally feel I'd really struggle to be happy and satisfied eating raw permanently, maybe I'm wrong here but if you considering happiness and being satisfied components of a healthy and happy life then it's a reason to cook.
Arguments against cooking;
1) Subjective again but I do feel that we need some raw food in our diets then round off our health, just as I think we become poorer for not cooking I believe we become poorer for not enjoying fresh raw fruit and veg, nuts and seeds. Certainly it could be argued I've contradicted the point about cooking means more nutrition for less effort but I'm not arguing for an entirely cooked diet, I'm arguing for a balance and if you're going to eat something raw then fruit, seeds, nuts surely is the place to be.
2) Cooking damages nutritional content?!?!, it does but the question is - by how much? As far as I understand it even if you are savaging certain veggies in your cooking the damage to nutritional content is relatively low, something which could be countered by merely adding a fraction more veg to the pot. There may be things that are damaged beyond all recognition or processes we do not understand, but I'm not aware or any personally - perhaps Omega 3's being unstable to heat is one? Once again I think the safest thing to say is it wouldn't hurt to have some raw veggies and keep an open mind on this point but I wouldn't say it's conclusive with regards to being a reason against cooking everything.
3) Bacteria, they does seem to be an argument that bacteria on certain foods is expected by our bodies because we've always ate them with bacteria on them and in turn they are part of the process we depend on for health from foods or in conversion of foods to what our bodies use them for - once again for me this is a maybe at best. Some bacteria you don't want, some might help b12 for example. It once again says to me that a little raw and a little cooked is probably safer than one or the other.
Conclusion - That's where I stand with it, I think both camps have a point but neither can say it's one-way only with anything other than personal instinct or bias. I am willing to hear any information or argument that would correct me or change my view here so please do share your knowledge but I'm not interested in western-hippy woo-woo, camp-in-the-woods, beliefs or feeling. Just evidence or rational, logical points. I don't think we should cut out either cooked or raw foods and should aim to strike a balance that see's both feature regularly.