This is a practice which I think made sense with older tech where one had to put some thinking into the execution of the steering. (How much to twist the control to achieve 5 degree? Oops a bit overshot, twisting back. Now hold it steady! That kind of thing.) but now that you just peck at a touch screen the actual task is taken over by a servo motor from the sailor. But because the servo doesn’t have ears to hear the command we keep a whole human employed to do the “hear command, shout, peck, shout” loop. That and institutional inertia. If we were designing navy ships for the first time today we would surely not do it like this.