Unfortunately, those fields are bound by professional regulations that prevent "experimentation". Which makes the difference between diagnosis & treatment -vs- research pretty clearly defined. The latter has vastly different requirements (eg. double-blind studies, IRB approvals, etc, etc).
I think it's a perfectly reasonable state of affairs to have psychiatrists sit somewhere on the "practice <---> research" spectrum. Don't like that your psychiatrist sits on the practice part of the scale? Find a different provider.
I think medical school / career pressures do a good job of selecting strongly for folks good at following instructions and memorizing information provided by some authority at the expense of curiosity or critical thinking. This works great when someone goes in for a common condition and needs routine treatment, but can get pretty frustrating for patients suffering from anything atypical.
Or maybe I’m being unfair and this is just true of people in general.
I just write code and I have to research stuff, why oh why would mental health professionals not be required to do so?
More fundamentally, an educated person should be able to have two different ideas in their head at the same time without having to suppress or reject one or the other:
a) nicotine is unhealthy
b) nicotine can be a cure
That seems perfectly reasonable for a practicing doctor before this study was published. How can you be mad at that?! Do you thoroughly research every correlation you encounter in your field of expertise when you have other clients & projects to address?
(It seems reasonable to me.)
Tracking nicotine vs your mood strikes me as being "research" -- especially since there wasn't a previously-known scientific correlation, as demonstrated by the recently-published results! Instead... I'd be glad that there is finally some evidence to explain your observations, and be hopeful that it results in new treatments.
(Also: Pawning off laziness onto others is a cop out. You could've pushed the research forward by doing more than just telling your doctor. But you didn't, I presume. Why is that...?)