But mapping raw values to screen pixel brightness already entails an implicit transform, so arguably there is no such thing as an unprocessed photo (that you can look at).

Conversely the output of standard transforms applied to a raw Bayer sensor output might reasonably be called the "unprocessed image", since that is what the intended output of the measurement device is.

Would you consider all food in existence to be "processed", because ultimately all food is chopped up by your teeth or broken down by your saliva and stomach acid? If some descriptor applies to every single member of a set, why use the descriptor at all? It carries no semantic value.