First of all, this should have been placed in the Hot Topics forum - moved it there now.
The notion that humans must have adapted to cooked foods does not make sense. For one thing, there are species which have never properly adapted to a particular raw food even despite millions of years of evolution and of eating that very food. For example, the giant panda has been eating bamboo for 2 million years, despite its digestive system etc. being carnivorous, not herbivorous at all. PP mentioned that even the giant panda's ancestor species had also been eating bamboo for millions of years before that, as I recall.
Also, of course, one can make a few mutations/epigenetic changes, here and there, but they may well be wholly inadequate to adapt to a particular food. For example, 75 percent of the world's population have lactose-intolerance despite eating (raw) dairy for thousands of years, and pasteurised dairy in the middle of the last century onwards. Plus, there is the issue of casein-intolerance, plus the extreme calcium/magnesium ratio, the hormones in dairy, so even if one adapted to dairy in 1 or 2 aspects, there are other aspects which may never be properly adapted to by humans.
Plus, the evolutionary difference between homo sapiens' immediate ancestors, the archaic homo sapiens, was rather small, whereas the bulk of our evolution occurred during the raw-meat-eating period, so changes would have been more minor than previous eras. Also, humans could well evolve into getting larger brains, while still not being able to evolve into adapting to cooked foods. After all, if it takes millions of years for species to fully adapt from raw herbivorous to raw carnivorous diets, then obviously it's going to take an even longer time to adapt to cooked foods, which are a wholly different kind of food with extra toxins.
For the pro-cooked-crowd to prove that we have fully adapted to cooking, they would have to prove that humans were somehow immune to the heat-created toxins produced by cooking and that notion is already comprehensively debunked by the mass of studies showing harmful effects from toxins like advanced glycation end products, polycyclic aromatic hydrocarbons, nitrosamines and heterocyclic amines etc.