It depends on your light head. If it prevents your wrist from bending upwards then you are correct. With a small light head that lets your wrist bend, it's not an issue. Light heads are generally getting smaller, so it might be worth revisiting at some point.
There is no need for revisiting anything, because there is no need to transfer the light to the left hand. The cannister stays where it is because of the use of stages.
Just the fact that you might be able to bend your wrist while donating is not enough justification.