I totally agree that the aircraft should not be overly complicated, and an automatic emergency system would have prevented the problem however switching over to emergency oxygen shouldn't have been a problem to begin with, really a very basic emergency procedure. I don't recall what platform he was flying before, but there is something called primacy, when we react to a situation we often fall back to reacting in the way we first learned. Perhaps the emergency O2 in his previous platform was not located in the exact same spot hence his trouble activating it. Regardless it's an unfortunate loss of life.In case those above determined the pilot error, emergency oxigen activation is not designed for fighter aircraft! We should understand that the pilot was enough trained and experienced not to be in error due to night flight and so on. Or, intensive training should be performed in activating this system (I mean: is it normal to complicate the pilot tasks? The computer on board are monitoring O2, so that it may be programmed...).