Not if he is giving the standard advice everyone in the industry gives. There are lots of conditions where the standard expectation is that "people like you don't really get well" and "symptom management is the name of the game." It would be considered malpractice to even tell people with certain diagnoses that you will shoot for curing them.
But if you don't even try to get someone well, if you only shoot for muddling through, don't you think that has bearing on the kind of results you get? If actually getting them well isn't even a goal, no, of course, you won't get them well.