it's like many things in life i suppose - should you decide to take a course, to read a book, to listen to someone else - you'll end up doing your own thing and finding methods that you are most comfortable with , and likely disregard much of what you were taught, read or told anyway - it's human nature. the PADI dry course indicates to use your drysuit for buoyancy control and your BC at surface or in emergency only. I suppose if a person learned and dove that way - WHEN - not IF your drysuit fails - you'll be able to get yourself positive with your bc. that said - , i dive dry (also being of the if you aint wet you aint diving mentality) for warmth - so often use my bc & my dry to adjust buoyancy - yes - it's task loading - i agree.
as to the manner to approach it....human nature again ? i learned to drive, ride, and many other things on my own, i would'nt DREAM of my daughter(s) learning to drive however without instruction from a professional - hypocritical - i know.
( i DID take a course BTW to learn to dive dry) I wouldnt say though training is the ONLY way to learn - it's an option. obviously a great many have taught themselves and figured it out on their own - and seem to be alive enough to write to us about it here- kudos to you, but i feel that self-learning is the exception - not the rule - especially in life safety devices - and let's face it - for 150$ and 4 hours of your life- you'll learn a hell of an awful lot more than you will in a dozen dives on your own - trying to figure it all out , and get better at something that takes a couple of hours with someone who knows it inside out.
then for you to decide what you chose to ignore or do differently - and ultimately get on with the business of diving !
cheers
marc