I agree with your overall point but at this time there are, thankfully, few believers of Scientology. Hopefully at some point in the future encountering an anti-vaxer will be as rare as encountering a Scientologist.
Additionally how about we don't just jump to lumping huge numbers of people into out groups to feel better about ourselves and create divisiveness? Or go to Reddit where you can cheer on people dying.
https://yournews.com/2022/07/11/2375584/emails-confirm-why-c...
"a substance used to stimulate the production of antibodies and provide immunity against one or several diseases, prepared from the causative agent of a disease, its products, or a synthetic substitute, treated to act as an antigen without inducing the disease."
Steriods and antibodies don't meet this definition. No vaccine has a 100% success rate, so reducing symptoms doesn't make it not a vaccine.