So true.
Also the notion that having a deco obligation means you have to scurry off to the surface makes no sense if you have enough air? He exited the ship at 28m after a dozen minutes, how much deco could he HAVE? He would have lost the lot on the way to the first stop surely?
As strongly as I believe we're responsible for our own safety and dislike legislating everything, a guide is still acting as a divemaster on deco dives in a dangerous overhead environment with divers who have usually never been there before. Given that it's unrealistic to require all penetration divers have advanced wreck, two tanks, two torches, a reel, cutting devices, dsmb etc - even though I think they SHOULD - all guides should at least carry two tanks at all times.