I think krulik noticed that the 'ambitious' vocabulary that is taught at the C2 level is nowhere to be found in the series like
Friends.
Three issues here:
(i) I think some can be found if you look hard enough
(ii) the series is about people who go about their everyday business; it's not about politics, literature or environment
(iii) it's important to distinguish between
active and
passive vocabulary. Just because a native speaker doesn't use a certain word, it doesn't mean they are not familiar with it.