Maybe because HN is rational, and thus doesn't like the factual inaccuracies in your post? 1) There were no adjuvants used 2) Antibody response doesn't linearly correlate with protection. Many vaccines provoke a higher antibody response but much less efficacy compared to the Moderna and Pfizer/BioNTech vaccine. 3) mRNA is an entirely new modality, it's not like people knew before-hand what would work, given point 2.

I don't think anyone is arguing that IF the booster is not needed, then we shouldn't double the vaccine supply. Consider the following risk however: There is such a thing called vaccine resistance. A weakly immunized patient becomes a training ground for novel variants of the virus that then starts spreading & vaccine doesn't work.