In case anyone might wonder, if you don’t convert from the camera input profile to an actual RGB working space such as sRGB or Rec.2020 before starting to edit the image, and instead you try to process the image while still in the camera input profile color space, various operations are likely to produce variously odd results, depending on the particular operation and the particular camera input profile.
But some operations (for example white balancing) do work quite well while the image is still in the camera input profile, though this depends on the type of input profile. My camera input profiles are well-behaved custom linear gamma simple matrix input profiles made using ArgyllCMS. I haven’t ever used other types of camera input profiles for white balancing and such, but I imagine results would be not so good.