If you are type 1 diabetic your immune system will have killed the beta cells in you pancreas that make insulin (or if you are a honeymooning type 1 diabetic - LADA or type 1.5 - the beta cells will slowly be being killed off by your immune system) you will eventually need insulin for the rest of your life.
Type 1 diabetes cannot be controlled with tablets and diet alone, and while it might be nice to come off the shots, if you are type 1 it will be a temporary reprieve while you are honeymooning only.