Wikipedia:Don't teach your grandmother to suck eggs
Teaching (your) grandmother to suck eggs is a saying that refers to a person giving advice to another person in a subject with which the other person is already familiar (and probably more so than the person giving the advice).
Wikipedia is home to a massive variety of editors with their own interests and focuses. Some of those editors dedicate a truly impressive amount of their time to a specific aspect of editing; whether that be working on articles relating to particular subject matter, or working on a particular behind-the-scenes process; AfC draft reviewing, closing requests for comment, an admin focusing on block appeals, et cetera.
If you should find yourself on the other side of a disagreement with one of these editors about their particular area of expertise, it is worth taking a step back from the disagreement and really listening to their point of view. Arguing that somebody who has spent dozens, hundreds or thousands of hours doing a particular task does not know how to do that task correctly is rarely a productive line of debate. Particularly so if more than one such editor is disagreeing with you. One person may well be wrong for any number of reasons, but the likelihood that multiple people are wrong about the same subject rapidly approaches zero as you add more and more of them.
See also
[edit ]- Wikipedia:No special considerations - Protesting to the AfC reviewers that your article is of some unique importance will not allow you to bypass the criteria for inclusion.