And IMO this is what separates really good/great divers, and especially instructor's, from the herd. The realization and acceptance that there are things that take time. Time to learn, time to absorb, time to get to know intimately before jumping in with both feet, so to speak. Too bad so many think rushing through class after class is the way to do it.
And even worse that agencies allow people to.
You are absolutely correct, Jim. The issues I had with the DPV course, real drove home the seriousness of diving a rebreather. One missed step in the check lists, one "brain fart"...... & could easily wind up a fatality statistic. Before the class, I just accepted that as fact, now I realize it as fact. As I said, I will still learn the unit, but I am going to take in much, much more seriously than I did before.