People have a belief that they can just tough out COVID, and so the vaccine is a long-term-risk tradeoff: suffer unknown side-effects of the vaccine, or maybe die of this disease that my friend had and recovered from?

This immunotherapy is cotemporal with "traditional" immunological and chemo treatments, so the mortality calculus is different: "Suffer potential unknown side-effects of an mRNA therapy or content myself with that 'three months' number the doctor gave me?"