Profiling the camera is not something that many people do unless the demand for color accuracy is very stringent, as in product/catalog photography, for several reasons: A. It is only the first step in an entire workflow that is strictly color managed from camera to output medium, unless the output is also well profiled the system loses much of its validity. B. A profile is specific for a given light source and is therefore usually considered practical only in the controlled and repeatable lighting of a studio. C. It is meaningful only for RAW conversions, but every RAW converter comes with generic profiles for every camera model that it supports that, while not as accurate as a profile for an individual camera, are nowadays pretty good. In past years there was dissatisfaction with the profiles in ACR and LR, so these converters provided the interface to customize the profiles, but in newer versions of the software the canned profiles are much better.