I've heard teens with diabetes, ridden with guilt, admit to cheating- - sneaking candy and junk food when they're not supposed to come near any of that stuff with a ten foot pole. And I've seen their parents wring their hands in frustration when they cheat.
Cheat is the wrong word. Cheat is an outdated word. It comes from a time before fast acting insulins like Humalog and Novolog were available.
Every kid wants or needs a treat every now and then. As long as you give insulin immediately to compensate for it, then it's ok. It's not cheating. It's not anything to get too emotionally distraught over.
If too many emotions get tied to eating and control, it could just lead to warped views and undue psychological stress.