Except that the mRNA vaccine technology has been in development for decades (the first successful mRNA vaccines in animals was in 1990). Moderna and BioNTech were founded on the promise of mRNA vaccine technology more than 10 years ago. They were working on a SARS-COV-1 vaccine for some years prior to the pandemic (among other things). Another fantastic thing about mRNA vaccine technology is how fast they can be developed when compared to traditional methods. China had the Wuhan 1.0 virus sequenced in January of 2020, and there was an mRNA candidate fully developed 3 days later. Of course, the safety studies and phase trials had to be fully completed which is why it took another year to release to the public.
Pointless argument. Anti-vaxers will refute these facts and claim the tech is one year old, is gene therapy, and WILL kill you. Stat. You have no hope to convince them otherwise, so save your energy.