This is one of those times where standard medical advice seems to be out of sync with common sense, like with masks. Maybe the advice is a white lie—e.g. to pr

This is one of those times where standard medical advice seems to be out of sync with common sense, like with masks. Maybe the advice is a white lie—e.g. to protect PPE supply in the case of masks—or maybe it has a certain delicious counter-intuitiveness that makes the speaker feel wise, which means it gets repeated more frequently over time, thus crowding out competing ideas. Or maybe it's an attitude on the part of doctors of "common people can't be trusted to do it correctly," so they default to the standard advice of "don't."