Granted, Howarde. (And I'm not trying to convince you to take a course you obviously feel is superfluous...)
But speaking from a life of facing emergency situations, it's like seat belts. I've seen a LOT of traffic accidents, and though many people argue with seat belt laws, I've never seen an accident that was made worse by wearing them. I have, conversely, seen a lot of accidents in which people's lives were literally saved by the safety restraint. I'll choose to wear my seatbelt regardless of the laws of the state.
In the same fashion, I'm not an expert diver and probably the majority on this board have much more underwater experience than I do. I have, however, seen a lot of emergencies (27 years as a trained firefighter and rescue team member, three years ER technician, a decade as a professional lifeguard, and another decade as a lifeguard trainer/instructor). During all that, I've never seen a situation when I thought, "Man, all that training and drilling was a waste of time." I have, though, appreciated the time I spent in training courses many times over. It's like being a soldier. You may be the best fighter on the block, but against someone who's trained, such as a Navy Seal, you are at a severe disadvantage in a firefight. I believe in stacking the deck in my favor (and the favor of my dive partner) by getting as much training as I can along with as much dive experience as I can.
Until you've had to tow a dying dive buddy back to the boat, that training may seem unnecessary. When that event happens, however, it's invaluable.