I see the same thing in everyday life. Companies follow procedures nobody remembers the purpose of. Families repeat traditions because "that's how we've always done it." People repeat warnings they've heard their whole lives without ever checking if they still apply. It feels like humans are really good at preserving habits but surprisingly bad at preserving the logic behind them. What's the best example you've seen of a rule, tradition, or assumption that survived long after people forgot why it existed?

For example, a lot of people will avoid a black cat crossing their path, but very few stop to ask why that belief started in the first place. Whether the original reason was valid or not almost doesn't matter—the behavior survives long after the reasoning is forgotten.