I am pretty sure if the stall warner went off in a steep turn with a RAF QFI instructor flying and you had instructed lower the nose all you would get is a boot full of rudder to pull the nose towards the ground.
This is what a few people here seem to be missing. Saying "lower the angle of attack" isn't just classroom based theory, it's what you need to do to recover from the stall.
In a busy aircraft working in three dimensions, you need to be clear and concise with your instructions. Saying lower the nose is all well and good, but lower relative to what? Mad jock has given the example of a steep turn, lower relative to the horizon would be achieved by yaw, and would not help lowering the angle of attack to get you out of a stall.