I have a stupid question n Need reply ASAP!!

not only is it not true but the reality is this actually can cure or at least control your diabetes. 
best to talk to a surgeon

I think it depends on if it's type I or II. I think it also depends on compliance...ultimately if the surgeon feels like your friend is too big of a surgical risk for whatever reason he doesn't have to operate on her. My guess is thier is more to the story than what your friend is telling you.