Why In-camera RAW?
What’s the advantage of using the in-camera RAW conversion feature? Aren’t RAW shooters anyway expected to use the computer? - Anastasia Rawford
There may be times that you have shot in RAW to get maximum quality, but later realise that the photo needs to be sent/uploaded instantly. It’s a situation that is quite common to photojournalists, in fact. In-camera conversion is best in such situations, especially as you may not have a laptop with a RAW software with you on field.
Moreover, some cameras include features such as Film Simulation or Distortion Correction, which a third-party software like Photoshop may not be able to replicate, but the in-camera RAW module, can.