Likewise your choice of vocabulary.
But, I can't see you play so I cannot beg to differ. However, addressing the issue you raised at the start of this thread, you ought to quite quickly be able to develop a new way of thinking. In whatever activity it is you engage, be it playing the piano, using a pc, washing the dishes, ironing your handkerchiefs, think in a new way about how you use your hands and arms. Think no longer about the arms following the hands, but about the arms positioning the hands. Think about where you want your hand to be and move it there with your arm. Become consciously aware of how you move your arms. At first this will feel strange at the piano, (and I dare say everywhere else), but within a month or two you should feel quite happy with this new way of thinking.
Try it out and let us know how you get on.
Richard.