> You can challenge incorrectness without condescension (and its usually more effective that way.)
In short bursts, sure. Sorta like, if someone believes that Elvis is secretly a lizard-man who is now pretending to be President Biden, then that could be responded to in simple, polite terms that aren't immediately condescending.
However, the scientific-community, literature, etc., would tend to be cumulatively dismissive and condescending toward the idea, failing to take it seriously. For example, such an idea wouldn't tend to get a mention in every article that mentions President Biden, even if proponents of the idea might continue to hold a strong interest in that belief.
This might lead to folks who'd hold such a belief continuing to find the literature dismissive and condescending toward their beliefs, even if no-one overtly makes rude comments on the topic.
But even avoiding rudeness is unrealistic. For example, someone who believes that Elvis is a lizard-man who is now pretending to be President Biden, and they start advertising their idea everywhere -- say on Wikipedia-articles and in comment-sections of articles -- how does one respond to that? If they're treated politely and accepted, then everything gets bogged down with non-sense. Eventually, everything's covered with conspiracy-theories about how President Biden's secretly a lizard-man, or a fish-man, or a real man pretending to be a lizard-man, or an alien pretending to be an AI pretending to be a fish, etc., and then everything's just noise.