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There is something to be said for using squat toilets instead of sitting toilets in public bathrooms, so long as there are properly cleaned sitting toilets for the elderly and disabled (I have seen some shocking disabled public bathrooms over the years)
Believing that the moon landing was a hoax, or that dark matter doesn’t exist, is ultimately harmless. The same cannot be said of disagreeing with proven, helpful medical knowledge, in favour of a gut-feeling based alternative that only makes things worse. It is a moral imperative to make you realise you are wrong, or failing that, thoroughly demonstrate it to everyone watching, so your harmful ideas do not spread.