Holdfast, that's a very good argument for your profession.
Still, it's all about the intent for me, is it a genuine altruistic helping hand, or is it about pay by the hour and making a career and name for yourself...
That's an interesting perspective.
I'm far from convinced that intent - beyond a general professional benevolent desire to see your clients get better - is particularly important. I get the sense that this general professional benevolence is not what you mean by altruism...
... although personally, I think it is actually
significantly closer to true altruism than a friend trying to help another friend. Financial remuneration is a much simpler, more understandable and more containable confounding variable than having a direct emotional investment in the outcome of a situation. In fact, the therapy/supervision that therapists themselves have is often directed towards understanding the emotions that clients raise within the therapist, in an effort to try to understand and contain that potentially therapeutically useful, but also potentially dangerous and volatile, element in the course of therapy.
I don't think there are therapists who want to see their clients get worse; even if one is purely motivated by money, logically it would be very bad for your business/career to have clients who consistently got progressively worse. Clients would leave due to lack of improvement and you wouldn't get many new referrals, and eventually you would face disciplinary proceedings. So the idea of a malevolent shrink keeping a patient deliberately unwell to continue getting their business is implausible in practice, at least in the long-term. So if both the financially-motivated and the financially-unmotivated therapists have reasons to want clients to get better, both groups are going to adopt a similar position of general professional benevolence regardless of intent.
Incompetence and stupidity are another matter entirely, since I think we can both easily agree that these can exist irrespective the intent of the therapist! They're not really the issue we're discussing.
More generally on intent, and to really put the cat amongst the pigeons by playing Devil's Advocate, it can be argued that provided the models and interpretations are used thoughtfully (ie. general professional benevolence, allied to competence/intelligence), whether the therapist cares about the outcome is relatively unimportant.
For instance, there's RCT-level evidence indicating that computer-delivered CBT can improve outcomes in some milder types of depression. While live feedback from a practitioner improves those computerised outcomes still further, the fact that it can work to any extent at all without a human being involved indicates that therapist intent isn't the core determinant of improvement, since a computer has no intent whatsoever.
An interesting and possibly inflammatory analogy would be to consider what your response would be if you were up on a murder charge at the Old Bailey. Would you want a well-meaning dear friend with no deep understanding of the law defending you, or a experienced expert QC, even if he didn't care about the case beyond what his professional pride and reputation required?