
I don't doubt that ANYBODY who dives does so with firm surface belief that if a situation occured underwater they would do all within their power to help out an individual in distress... to the best of their ability.
But the fact is that... given the variables at play, what counts is what actually happens in the moment of crisis. It's easy to sit back and run hypothetical scenarios... and, in all probability, helpful. But *the moment* is a whole different thing... and the only reliable measure is not "what you think you'd do"... but "what you did".
Trying to analyse a disaster *before* it happens is an exercise in futility... you CAN deal with the 'gross' elements... but the peripheral issues will always be grey... and, as they say, "The devil's in the details..."
Wanna' save a life? Don't ask your insta-buddy how he feels about coming to save yer' sorry butt... ask how he feels about proper pre-dive prep... if your buddy isn't inclined to cooprate... strike one...