hi dreamland
raw data approach = simulator stuff as well, of course !
Pax pay to fly safely from A to B or vice versa and they wouldn't pay, and they wouldn't feel very comfortable knowing that we in the flight-deck are doing our "own" training-flight-session instead.
Revenue flights are one story, doing Training is another story. Should not be done at the same time.
Have you ever thought about the

extra workload, arising for the PNF, if PF is doing a raw data departure or approach, on top of that in a busy airport, on top of that during rush-hour.
it's just UNSAFE !!! and anything else but good airmenship

- my opinion
At least twice a year we all usually have 2 SIM-sessions = in total 16 hrs. Guess a lot of chances and a lot of time to do everything with the "aircraft" we want to do, but should not necessarily done on revenue flights. Just ask the guy in the SIM behind you