There is no such thing as any potential trope being too common to make an actual trope.

{{Plots}}, {{Characters}}, and {{Conflict}} are tropes, and [[OmnipresentTropes literally no proper story can be told without them]] (whatever form they take). That means that, by necessity, they have 100% use on any work that tells a story. ''If those aren't too common, then no other trope can be too common.''

This is why Administrivia/SeenItAMillionTimes doesn't mean we can't trope it, and never did. It only means it's really common, and that there are perhaps too many examples to make listing them worthwhile. This also means that TruthInTelevision doesn't invalidate a trope (especially since it lists valid tropes on that page), because if there are reasons it's done in fiction (whether or not the reason applies in RealLife), then ''there are still reasons it's done in fiction''.

Occasionally, a trope is [[OmnipresentTropes so common]], either throughout storytelling or [[NecessaryWeasel within a genre or medium]], that [[PlayedStraight straight examples]] greatly outnumber [[AvertedTrope aversions]] and various ways of PlayingWithATrope. We can still list the latter instead.

Finally, Administrivia/PeopleSitOnChairs should not be used just because a trope is common. That's about lack of purpose, not too high a frequency. Something could be rare and still have no purpose.

Compare and contrast Administrivia/TooRareToTrope and Administrivia/NotATrope.