For not being Bayesian, they have no authority that warrants such condescension.
It's unclear what you mean by both "Bayesian" and by "authority" in this sentence. If a person is "Bayesian", does it give "authority" for condescension?
There clearly is some truth to the claim that being around longer sometimes allows to arrive at more accurate beliefs, including more accurate intuitive assessment of the situation, if you are not down a crazy road in the particular domain. It's not a very strong evidence, and it can't defeat many forms of more direct evidence pointing in the contrary direction, but sometimes it's an OK heuristic, especially if you are not aware of other evidence ("ask the elder").
Maybe "authority" is the wrong word. What I mean is that the opponent making this claim is dismissing my stance as wrong, because of my supposed less experience. It means that they believe that truth follows from collecting anecdotes. They ascertain that because they have more anecdotes, they are correct, and I am incorrect. For not being rational, we can't trust their standard of truth to dismiss my position as wrong, since their whole methodology is hopelessly flawed.
And happy new year to everyone.