Running a sugar >10 consistently is like pouring coke onto the floor and walking over it – your shoe sticks. This is the sticky mess inside your entire blood system – arteries and veins and the reason that things like blindness and kidney failure develop over time.
But, on the contrary – if you control your sugars YOU will live LONGER than the average population. Particularly if you are using correct diet and exercise in combination with your meds to get that control.
The choice is entirely yours.