I guess it depends on the topic. Flat Earthers - yeah I’d agree. Until someone comes up with compelling evidence. But those people have no real power - no ability to set policy based on their belief. Just cranks and harmless.

But it’s not fair to cherry pick such an obvious straw man. There’s a million current examples that are much better. Covid origins which were summarily and aggressively rejected as unorthodox for example. A ton of climate science, etc. No one is an authority on truth. Requires consensus over painfully long times.