The meta-myth under every other myth on this list.
Why it spread: best practices let you outsource judgment to authority and feel safe in a meeting. "Baymard says" ends arguments.
The truth: a best practice is the average winner across thousands of unlike pages, audiences, and price points. Applied to your specific traffic, offer, and context, the average is often wrong — that's literally why split-testing exists. Best practices are hypotheses, not answers.
What the advice skipped: use them as a starting prior, then test against your own data. The page that wins for you will violate at least three "rules" everyone swears by. Copy the method, never the conclusion.
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"Follow proven best practices and you'll convert." [BUSTED]
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