WHY are the mRNA experimental vaccines being recommended to people who successfully produced their own antibodies and effectively neutralized the virus?

Presumably, those who got infected recently would have had contact with the newer mutations, which makes the vaccine even MORE REDUNDANT, since they were developed 10 months ago from virus strains prevalent and isolated in early 2020, and largely gone now. Why do I need Pfizer engineered spike proteins for a virus that doesn't even exist anymore, when my own immune system developed antibodies of the correct geometry to latest spike proteins (which also happen to be the most mutagenic part of the virus)?

My retarded public health jurisdiction is not capable of formulating a coherent answer. Please tell me why I need the vaccine if I've had Covid-21?