Psychiatry has absolutely been used as a tool of oppressed by the capitalist class, but psychiatry can be a liberatory tool if practiced with consent, dignity, and good science. Psychiatry has done wonders for my mental health. It would be better to eliminate capitalism and all the other hierarchies that exacerbate mental health disorders if only one or the other must be chosen, but in the short term, they're not going anywhere. And I reject the notion that we cannot do both. Even then, I am skeptical that eliminating hierarchical oppression would completely eliminate the need for psychiatry; put simply, life is fucking hard, and some people need chemical help, myself very much included.
I do not recommend psychiatry for absolutely everyone, but the option needs to be available. I respect if you do not want to use this tool, but please understand that for some of us, getting rid of psychiatry would eliminate our most effective means of battling our demons.
