I think you need to digest his second to last paragraph again. It seems to me it's actually more like a jpg file that has the most dynamic range (but unlike a raw file doesn't contain data outside of the visible range, hence the term "baked", or fixed. How it makes colour better for grading I'm not quite sure, maybe it's better because none of the colour channels are clipped as easily when processing, or bullying the file in post. I'm a newb at this myself, so please anyone correct me if I'm wrong.