Type 1 diabetes is one of the many types of diseases caused by some kind of disorder of the immune system. It is in fact thought to be an autoimmune disease where the body attacks the alpha cells of the pancreas (those which produce insulin).
Unfortunately, unless scientists find an alternative cure (other than taking in insulin), it can't be cured.
However, I consider you are lucky on one side because all of us here have been bitten by the aviation bug and all the wannabes struggle their way through (financially... mostly... then emotionally, physically, mentally) etc etc to get their licences etc etc!
At least, you got rid of that and can move on to a different career, which may at the end offer you what you have been really looking for! Good luck!!