Always, always set up my own gear. That is something I specifically ask about when choosing an operator.
The better operators fully understand this and expect you to do this. It helps them to assess your skill level as well. If you dive long enough with one outfit and get to talk to them they will tell you that. The crew setting up gear is mostly done by outfits catering to beginners or mostly frequented by an US clientele. Maybe a bit of a broad generalization, but I have seen many Americans expect that and the boat crews also adjust to that because they want to earn their tips.
The fault is clearly with the training agencies. That should simply be a huge no no, just like having somebody else pack your parachute. Those who cannot set up their own gear are simply not fit to dive, IMHO. Seen it too often.