My argument was definitely tailored for the mRNA discussion, although the purpose was more to illustrate the broader principle, but, not knowing a whole lot about adenovirus vector vaccines specifically, is it even the case that adenovirus-vector vaccines have been widely used in the general population?

I couldn't find great info with a cursory search (indeed the top result is the CDC which consistently fails to cite anything they ever claim, ugh), but I wonder if the general argument still applies for these types of vaccines as well.

Anyway, thanks so much for catching and pointing out my error there.