I'm looking for a word or term, possibly a logical fallacy, to describe the idea that belonging to a group inherently grants the members of that group credibility in issues pertaining to that group, even when such an assumption isn't necessarily vaild. Examples include:
a person claiming expertise in child development or parenting in general purely by virtue of being a parent themselves
a person claiming that their practice of a given religion makes them an authority on said religion, simply by virture of that practice.
a citizen of a country believing they are automatically more informed about their country than any outsider, regardless of how well or poorly informed said citizen actually is.
Conversely, a medical doctor is self-evidently an expert in medicine, because that expertise is a prerequisite to becoming a medical doctor. This is at least partially the opposite of the "Calling "Cards"" fallacy (dismissing a vaild argument as "playing a(n) adjective card").