This is very interesting
I read a very interesting book a few years ago - "Catching Fire - How Cooking Made Us Human" by Richard Wrangham which suggests the the ability to cook food allowed humans to become the primary primate species on the globe bacause it made us able to digest and use food so much more efficiently than other primate species which ate uncooked foods that required much more time to chew and digest to aquire their caloric intake. The control of fire made this possible.
Look at the size of the teeth and the gut in a gorilla compared to a modern Homo Sapiens, but H sapiens has dominated the globe. Perhaps because we externally begin digestion by cooking our food before consuming it. A very interesting book which suggests exactly what your link found, that externally processing food allows faster and more complete utilization of its nourishment than that obtained by normal mastication and digestion.
And may explain why human teeth and gut are so much smaller than those of a gorilla.
Indeed, the author presents some fairly compelling evidence that humans cannot survive and prosper on a diet of totally uncooked food, that we require our food to be cooked. Fire let us become human!