Have it? Not have it? This thought process can lead us astray, it may be more complicated than which box to tick. There are probably a whole range of experiences that could fall under any particular banner. All cases are unique, and the only place for a textbook example is in a textbook.
What matters is what experience the person is going through and the features of their situation that make it so. Melsy's post was very enlightening about how things vary from day to day - you have to treat what you find, not what it says in a set of instructions. Also about the delayed effects of treatment; the effect only starts with treatment, everything you do alters the direction of their whole life forever.
People do cling to their condition, especially in more toxic cases, the process of unravelling it all can be very daunting. It can challenge everything a person believes in, their identity, the structures they create for themselves, and it can be physically very tough or even dangerous. So it's not surprising that not everybody is ready to get out of their situation.
However, whether somebody wants to be cured or simply have some support to get through the day, and whether that matters, are huge subjects too.
If you can find a way to make life that bit better, then brilliant.