Left or right hand dominance is congenital. Suppose a child incurred a disorder such as dyslexia from being taught to use the non-dominant hand (as many have been due to the lack of left handed equipment, or teacher preference for conformity). Who would be responsible for the malpractice?
The comments in this article suggest many children were negatively affected from this. Do any of them have a legal case?
(Notice there are a few left handed desks on the far left in this picture. Ideally I think they should not isolate the left-handed people on the edge of the classroom.)