mb2002
Isn't it easier to "divide" the tasks in our brain (or in the FCC or FGC or whatever) and assign flight path to the pitch input and speed to the thrust input?
Just remember, we break things down to teach more effectively - it does not change the physics. When you are really good at flying, the breakdown essentially disappears as you smoothly coordinate all the controls to achieve a smooth flight path with the energy managed to achieve the required targets.
4dogs has it nailed. I have no problem with, in a particular type, the flying technique being taught in a particular way. My issue is that people tend to take that specific technique and then assume dogmatically that it is a complete statement that applies to all aircraft.
pb