I think the biggest thing I've learned from psychiatry over the years is that docs will absolutely prescribe you meds and change them to fit your needs, but they only know what you tell them. Tell them about your anxiety and not your depression? They'll prescribe you anxiety meds. The same goes for psychologists: they'll basically only help with the problems you tell them about.
@makyo reminds me how important it is that people can access language to help understand and describe what they’re experiencing.
I guess it boils down to: your treatment is a conversation, not some one-way benediction (or malediction) that blesses or curses you with a diagnosis and medication. I've been through SO MANY meds, and the reason is that I believe there has to be something better. We're mostly fumbling in the dark, when it comes to psych meds, but we're getting better.