Hi DarthTom,
The clicker is a fascinating bit of kit, but as you say, it needs to be handled with understanding.
I nearly wrote that it needs to be handled " WITH CARE" but I refrained form saying that as it tends to get translated into; hesitantly, or too slowly.
I agree with you that the clicker isn't a draw length check; but must add that in its operation it does give an equal draw length to all shots, in a similar way, it is helpful at keeping arrows on the rest in a cross wind.
To my way of thinking, one of the great benefits of using a clicker is the way it encourages the user to continue the draw after the string reaches the face.So many newer archers draw to the face. STOP. aim and release. With a clicker fitted, the string reaches the face, but needs some more drawing before the click. An archer who is still drawing when they release, is far more likely to have a follow through that is a natural reaction to the sudden drop in holding weight.Those who draw to a stop, have to manufacture something that they have already lost.
When asked about fitting a clicker for the first time, one of the coaches from Lilleshall, said that one requirement is that the archer is able to draw the string to their face and still be able to draw some more before releasing. If they can't do that, there is no way a clicker can be used. I have kept that at the front of my mind ever since; it seems so clear and simple.
As to the ability to have a consistent draw; I would add that consistent in this case means that it happens in much the same way shot to shot.In the same way from start to finish. From raising the arms and getting the bow into position at arm's length. To drawing the string hand to a similar place below the jaw. The actual draw length may vary a bit (1cm) perhaps but the overall plan is repeating.
I can tie my shoelaces without looking, but the loops may not be the same size as each other nor the same size every time. I think I could be trained to make a better job of it. I am well on my way to warrant some training to get the loop sizes more consistent.