To answer your question, because they can Chosen. Until just last week, Gloria.tv tried, as so many media portals before it, to create a "free speech" libertarian utopia. GTV allowed people to say whatever they wanted about anyone else, the Pope included. The largely self-imposed standards against profanity were even beginning to slip, here n' there. ...all of which produced the environment before you today.

GTV's administration has taken drastic, if necessary, measures to correct this. However, I've seen no Announcement prohibiting cynicism or being argumentative.

At the risk of displaying both, may I suggest some charity towards those you perceive as "showing off"?

It's just as possible such people are simply speaking from whatever education level they've achieved. "Showing off" implies motive and that's notoriously difficult to prove. Perhaps such people are neither trying to "show off" nor even care if others are intimidated by their discourse.

In all fairness, you'll soon discover it's difficult if not impossible to "dumb down" your vocabulary or knowledge-base sufficiently to avoid intimidating somebody somewhere.

At the same time, even if you attempted doing so, that would open you up to justified criticisms of "still showing off" through being deliberately patronizing.

Personally, I hope you choose to stay on GTV. :-)