Earlier quoted context omitted.
I had in mind PEG-coated-mRNA and adenovirus vaccines which cause the body's own cells to express a close analog to the SARS-CoV-2 spike protein antigen, a thoroughly novel approach which was rolled out to the general public roughly nine months after the very first tests were administered in humans, and in the case of mRNA vaccines more broadly, was described in articles as late as 2017 as potentially having problems…
You’re basically saying that we should not trust the internal combustion engine because Ford released a new model car.
Even in the case of traditional vaccines, it was generally expected pre-Covid that years of testing would be undergone before a rollout to the general public, so even putting aside the question of novelty, the more apt comparison would still be something like "Ford pushes out a new model car with a significant body redesign while doing a bare fraction of the usual crash safety tests."