I disagree. Generally speaking, psychologists aren’t competent either. Psychiatrists at least know about the human body, its interactions, and psychopathology in depth. Psychologists study the things you mentioned, but many fail to study the biological parts and how deep psychopathologies can go.

Therefore, I’ve encountered many psychologists who think that all problems are caused by the environment, by inner (often cognitive) processes, etc. They fail to understand severe mental disorders such as schizophrenia and bipolar disorder, and regularly make one of two mistakes (if not both in different contexts): downplay the severity of psychosis and mania/hypomania or think the mildest symptom is psychosis or mania/hypomania.

Also, many psychologists I’ve known and seen lean into the antipsychiatry movement. This may not be a problem when treating, say, mild to moderate depressions of a certain reactive nature. They might advise not to take medication and, indeed, medication may not be necessary for these cases. But to do the same for endogenous recurrent depressions and, again, severe mental disorders is borderline clinical negligence.

Finally and in the same vein, many psychologists do not understand how dependent on the physiological are phenomena such as behavior and beliefs. They often picture our mental experience as mostly free, perhaps influenced by many factors (e.g., psychoanalysis), yet ultimately driven by ourselves. I disagree. I disagree not only because there are many scientific observations to the contrary, but because my own experience has been ever-changing by the silliest of things, like medication for physical illnesses, food, weather conditions, etc. Anecdote incoming: >!Traits that psychologists would try to explain away, treat in talk therapy, and solidify as part of my personality were mere consequences of the physiological and went away immediately after I stopped the causes. The average psychiatrist would find this obvious, while psychologists were often surprised.!<

If I may add, both psychiatrists and psychologists face a profound ignorance about the things they study. Psychology has tried to explain them, and in this effort it has created dozens of different and incompatible schools of thought (e.g., psychoanalysis, behaviorism, cognitivism, etc.). Psychiatrists are also at a loss in the definitive hows, and I should add there’s also dense theory behind it (it did not stop with Emil Kraeplin or Karl Jaspers). If you ask me, I wouldn’t consider one more scientific than the other just because one created more paradigms/theories; if anything, remaining observant and pragmatic sounds to me more scientific (in both disciplines), but that’s a whole new conversation…