You're trying to argue the fact that most TNG-era Trek didn't portray most of its alien races as one-dimensional monocultures? A ridiculous argument.
Your defense is a Klingon restauranteur, who, BTW, was derided in another episode by a proud, traditional warrior by his choice of vocation, and a lawyer, who used battle metaphors to describe himself and his professional throughout the episode?
These are but insignificant drops compared to the deluge of sameness with which most alien races, especially Klingons, were continually portrayed.
A Ferengi scientist character in "Suspicions" even has to point out how unlikely it is that there are Ferengi scientists at all and, in-universe, the character was treated with derision by other scientists. Which is a laughable notion for such a technically sophisticated race, but there you go. There's a reference in the same episode to how Klingons similarly treat their scientists like crap.