I think that's a little unfair. I've encountered people who are nervous about the vaccine, largely because its a black box they don't understand. They changed their mind once pointed at an appropriate level resource (e.g. something more ELI5 than a scientific paper, but not an actual eli5 explanation that glosses over all the important bits and leaves more questions than answers). Although perhaps hestient and antivax are separate groups.

In any argument, its always convinent to assume your opponent is just unreasonable. That makes your failure to convince their fault not yours. Maybe some people are, but its a dangerous slippery slope to operate under that assumption.