LCB, no offense taken here. I think it's just some communication difficulties between those of different trains of thought. My belief is "one well thought out shot" teaches me very little. 25, and I use that number arbitrarily, well practised shots teach me a lot, 50 of the same teaches me more, 100 etc. etc.
In no other sport that I can think of do you do something just a little. My sons go to private baseball coaching. In the cages, they'll swing well over 100 times at live balls, trying to hit every time. The coaches point out after every swing the form corrections and they try it on the next swing...but they don't stop foot position work to concentrate on hand position, or bat position, or head position etc....it's all worked on at the same time. I've seen this in every sport I can think of...working on mechanics as a whole instead of seperately....because that's the way they are used. Though it may not work for some, it certainly works...as convincingly as the "seperation" method does with you.
AllenR, ahh yes, Len Cardinale. A superb coach I hear, with many years of history and credentials to back it up. I have known a few who learned from him, and all felt as you do...his teaching is obviously consistent. However, it's not the only way to go about developing an accurate shot. Again, just a matter of some folks doing it differently...I don't think you need to seperate those mechanics or precesses out to work on them. You can, or at least I can and whole bunch I know can, work on them as a collective. To me, it's not possible to make a good shot and not worry about what is happening with your bow arm...if you drop your bow arm, it's not going to go where it should therefore it cannot be a good shot. But maybe that's just because of the way I shoot, and learned how to shoot.