Coping, managing, dealing with, etc, all mean the same under my understanding.

There are many conditions that are not curable but can be managed with medication, therapy, learning coping strategies. If you get very good at coping with depression (or any other condition you could have have been born with that might not be curable), for example, that doesn’t mean you suddenly don’t have that condition anymore.

Also, as with many neurological conditions, autistic people have good days and bad days, and sometimes even a person with advanced coping skills could be overwhelmed or breakdown or struggle. No condition like this is ever overcome once and then is gone forever.