Those kinds of things, along with work-interviews and small-talk at gatherings and why your boss talks to you at the urinal, because it’s far more about viewing how someone presents themselves and conforms to societal expectations.

Not necessarily in negative, overbearing way, often this is literally how we appraise people all day, all the time. This is how we keep from inviting psychotic strangers into our tribe who may cause damage. Just seeing if they can conduct themselves as we expect so we know they are likely to hold to their end of our social contracts.

(All of this is also why we’re such a racist and scared species, which is also what inspires college self-intros.)