Agree that a specialist “t” can not necessarily provide a more successful therapeutic partner compared to one who is competent /experienced/people studying/ willing to learn / embued with common sense etc etc
To say that one has more experience of a particular issue than the consulting “t” is akin to saying one has more knowledge of ones child vomit to a GP or ones dogs scratching to a vet-surely that’s stating the obvious but that knowledge doesn’t mean we don’t need help from someone trained to put all the pieces together and formulate some sort of plan to move these issues towards “healing” if possible
I learn a lot from my clients and their owners everyday but I believe I know what I’m doing / what my role is pretty much all the time even if I have to ask for another opinion or consult out for specialist medical/ surgical treatment
Finally imo all the “healing” professions have an element of the unknown even in what appears to be a “textbook” case as every sentient being has their own thoughts and feelings and reactions so all of us are “winging” it to some extent

The exception to the above is I believe the case of children/adolescents where specialist intervention provides a kind of safety and legal net for all concerned (obviously could still have an incompetent “t”