With further thought and after further studying, I don't agree, think of how heavily used Psychiatry is by states (both bourgeois and proletarian), and psychs often collaborate with the police; it's quite important to study and critique them, as not doing would lead to an underdevelopment of Marxism and a bunch of policy errors in communist parties.
For a start, look at some definitions of psyche and mind:
Idealist outlets quite commonly defend the mind and psyche over the brain and
- Example: Big Think accusing materialists of saying that we don't have material proof of the brain interpreting color. (Of course, they're wrong: we have tons of evidence to disprove such lies. https://neuroanthropology.net/2008/09/04/colour-is-it-in-the-brain/)
They seem to be mostly idealist constructions which developed in the 16th to 20th centuries because Neurology was still under developed at that time.
It would be important to critique them to update materialism. In fact, many neurologists and the research of modern neurology often disproves Psychiatric constructions.
Now, of course, it seems that Psych can exist in the socialist state and not undermine it at the same time (as long as its idealism does not materially undermine socialism); but with it being close to part of the general state, it would be dissolved in the transition from socialism to communism.