What would happen to someone who doesn't need dialysis but goes through it anyways?

Dialysis risks. Dialysis is a high risk procedure that should not be done unless absolutely necessary. The risks do not increase of its not needed, but if there is no benefit they are senseless. Complications include blood loss, both rapid and slow, dangerous blood pressure drops, reactions to the fluid or membranes used, and increased risks of infection.While dialysis is generally safe, why risk it if no need?
Loss of kidneys. Dialysis tries to do what your kidneys naturally do. It cleans and filters toxins out of your blood. If your kidneys have not failed and you get dialysis, your kidneys will eventually shut down since something else is doing its work. Like any muscle, if it stops working/exercising, it will atrophy.