Earlier quoted context omitted.
I'm not sure I see where you were going. Which, check my history, is not too say you are wrong. Even odds I'm just missing it. However, it seems you are assuming that we have adapted to our current diet. Possible? Surely. As an argument, though, this is appealing to the incredible nature of our bodies. I'd prefer evidence.
Your history suggest you are pretty well informed on this front so I will go straight to the point. First, adaptation != evolution. The ability to digest and use sugar has been with us for many millenia. There are ways where our body is not well equipped to deal with sugar (Such as dental hygiene, I touched on it briefly in another comment in this thread) but the other problems mentioned in the linked article have mo…
On the sugar front, is the evidence really lacking? Taubes' book referenced tons of ancient studies that showed support. Anecdotally, I have yet to meet someone that was not benefited by halting soda.
I said that I am not interested in halting research in any direction. It is likely, to me, that there are interactions involved and this will require study. I have yet to see anything that vindicates sugar, though.