Earlier quoted context omitted.
We use EM radiation for illnesses and doctors apply them. It's one of the most important diagnostic and treatment options we have. I think what you're referring to is invalid therapies ("woo" or snake oil or just plain ignorance/greed) but it's hard to distinguish those from legitimate therapies at times.
> We use EM radiation for illnesses and doctors apply them. Do you have examples of usage as a treatment? I can only think of rTMS (whose effectiveness is contentious).
What is maybe the most applicable that is widely accepted is electric therapy for people recovering from ACL surgeries.