we killed the cancer.but the patient is dead too.
or how diabetics are told to eat plenty of carbs.which is actualy based on a misinterpretation, i couldnt believe it when i read it.
Exactly. 
My grandfather has type 2 diabetes. Doc said he can eat whatever he likes, as long as there's no sugar in it. 
So: breads, pasta, etc, the doc OK'd ALL of it!!! 
This doc doesn't have  a single clue about blood glucose levels. Just "stay away from sugar and you'll be fine." 
Oh brother!!!