Mostly agree, after all, our food is heavily "processed" in our digestive system, so it's possible many of the things we think 'unprocessed' foods provide do not survive the stomach. That said, I don't think we know this 100%. Sure, we have mapped essential vitamins, minerals and nutrients enough to know what keeps an organism alive, but there may be other things gained by consuming, say, minimally processed cellular material.

Again, on the other hand, some foods require processing to extract necessary nutrients(i.e. nixtamalization of corn).