As a matter of style, your request for more information wasn't simply that; it feels more like an attempt to find reasons to entirely dismiss it. Also, the request shows no awareness of the fact that humans are complicated and in fact do do self-destructive things that aren't in anyone's best interests.

Ignoring such details, the story still clearly simply communicates the point that there are situations in which non-disparagement clauses can be morally useful; namely, those in which the disparagement is malicious, fraudulent or unfounded, only some of which are remediable without such a clause. Getting down into further detail on this particular story wouldn't seem to help anyone.

(I don't see anyone stating it was "poor taste", but maybe edits happened)