I think it was more about the show's message that "peaceful" solutions would be preferred over "aggressive" ones. A security chief would instinctively be inclined to fire phasers. Just like Worf suggested often when he took over. And we all know how that went.It's exchanges like this that gives you the full story on why Denise left the show. Her character is deliberately written to be incompetent that you'd think the writers were doing this to her character on purpose.