The evidence in favor of the mRNA-based COVID vaccines is overwhelmingly positive in terms of efficacy and lack of side effects. (Yes, they exist, but they are extremely rare) And neglecting to vaccinate one's self has serious risks for those around you, particularly at-risk folks. There aren't real alternatives, besides physically separating one's self from all human contact.
Psychiatric medicines are way, way, way more of a mixed bag. The side effects can be massive. The process of finding the correct one is very trial-and-error. For many people there are alternatives.
Please don't misunderstand: I know many who have massively benefitted from these meds. They can be positively transforming and lifesaving. I'm just questioning the value of comparing these two things.