I would have to disagree with Dr. Jones. Perhaps they do not "smell" like you and I do, but they can either detect scent (that would be smelling) or they taste scent at a distance (and that would be smelling).
The bullhead catfish has been proven to detect scents in extremely low concentractions.
Trout, Steelhead, and Salmon have also been shown to have extreme sences of smell.
I don't think Bass and many other game fish are as influenced by scent, but they will at times respond to it.
I remember one trout fishing trip where the fish were just following our spinners. We went through several colors, sizes, styles, and all we were getting was a close follow.
One of us put an oil based scent on one and he caught a fish on the next cast, and the next, and the next. The other caught nothing until we put the same scent on that spinner and the results were the same - fish after fish after fish. I know, this is rare, but it did and does happen.
Remember, even oil will desperse in water to some degree, and all oils desolve a small amount in water. But I will agree that water based scents desperse much better.
Now don't get the idea that I think scent is super important, it is not at the top of my list. Still, at times, it does make a difference, so................ as I stated, if Dr. Jones has made the statement that fish cannot smell, then either Dr. Jones has misstated his case or he is being misquoted. IMHO