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It certainly can be "perfectly managed" for some people. It is one of the most conquerable diseases out there.
losing weight and managing blood sugars is not always easy, but we have amazing advances in both diet and exercise, and of course medications, which make this as straight-forward and simple for patients as possible.
For instance, lap band surgery and Roux-en-Y surgeries have often been cited using the word you did, "cure" for diabetes.
so, yes - there are many great, accessible avenues to "curing" diabetes.
I would recommend you visit https://www.supertracker.usda.gov/, and set up a profile, so that you can track your food intake. This is a free service that will give you detailed information about your diet, and the wide effect it has on your nutritional intake. This is one of the best ways to start.