This is the typical response. You have never seen this done, so you use your imagination to guess what it must be like. You discount what I say, even though I have many years of experience teaching both ways and can make a comparison based on experience.We often talk about new divers being task loaded/task overloaded by the environment, their equipment, and their developing skillset. What then is the incentive for an instructor, often given limited pool/confined water time, take a group of people with varying comfort levels, varying athletic ability, varying swimming ability, varying focus ability, to put them in a situation totally new, with equipment they are not familiar with, and they have to pay attention, learn, and assimilate a skillset that their life depends on, all while managing body position and buoyancy?
I am not saying it can't be done. And, I am certainly not saying it shouldn't be done. But there is not a whole lot of incentive for an instructor to institute neutral buoyancy as the overarching skill at the beginning with which they will introduce/teach all other skills.
-Z
I don't know how others do it, and I don't want to repeat a long description I have posted before, but in my case, after some initial work to get them comfortable, I taught the initial skills to students who were prone, with the fins and maybe their lower legs touching the floor, spread behind them. Horizontal trim is important. They had enough air in the BCDs to allow them to rise and fall near the floor as they breathed. It was like fin pivot, but not far from the floor--never up to 45°. They were far, far, far more comfortable and at ease than the students were when I still taught kneeling.
From that beginning we transitioned until the skills were done mid water.