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If you have somehow proven to yourself that something is better or worse than the standard practice, is it not in your best interest to share such an insight with everyone else?

Take, for example, doctors washing their hands. Once, it was crazy take to mandate this. Literally, Semmelweis was driven crazy from proposing this and becoming ostracized. Read the NPR story "The Doctor Who Championed Hand-Washing And Briefly Saved Lives", it will give some insights into this.

If you limit things you expose yourself as what you see is "correct" then you will never come to learn something new.