I let my grandpa with Alzheimers go to the bathroom alone
Why would you let your Alzheimered grandfather go to the bathroom alone?
He knows how to go to the bathroom, so I leave him alone.
While he might know how to go to the bathroom, he could get confused without you and need your help. You should help him in the bathroom even if you don't want to.
Why do I have to help him? No one needs to watch over him like a little kid.
While your grandfather is not a kid, his mind can be like a small child's that can't make good decisions for itself. Not taking your grandpa to the bathroom could result on something bad happening to him, so start watching over him more carefully when he needs to go.