I've been completely raw for 3 years now, 90-100% carnivore. Never had any reason to eat anything cooked, but it's not my religion. While I do encourage people to keep their foods as raw as possible, that is not always an option for other people, and if I was in a hypothetical situation where I had to eat cooked or starve, I'd still eat the cooked food. I don't do well on large amounts of plants, specifically fiber, but I've consumed raw coconut fat, raw lemon juice, certain raw herbs and raw teas in the past. I've added larger amounts of coconut fat to my diet in the past when I wanted to gain weight, but as an addition to my diet, not as a replacement for the animal fat I eat.
Generally I don't mind adding some plants for medicinal or supplemental purposes, as long as they don't give me any trouble. As far as cooked food goes, there was no reason for it. I felt worse on it, and it was not as appealing anymore. I don't care what other people think of my diet either, so I would ignore any such requests to eat cooked.
And as I've already stated, Raw, Paleo, Carnivore etc... is not my religion. I do what I find is best for me, and that is what everyone else should be doing as well.