I agree, and that's why I try to answer questions with friendly answers. It wasn't so much that I was advocating for dismissing the question, I was just trying to explain why experts have gotten really, really tired, and might do so.
(Also: My local county facebook group has no shortage of very vindictive, angry, and seeming inexhaustible anti-vaxxers.)
And they quickly reveal their bad faith, at which point they can safely be ignored.
Or, if you don't feel like discussing it, it's easy enough to say "I don't know about that, but the anti-vaccine stuff sounds like lies to scare people so I decided to trust my doctor."
If honest questions are met with hostility, while the anti-vaxxers are friendly and "helpful", guess who's going to be more influential?