^ It sounds ridiculous if only one man does all the talking. And if he only talks.
Katou demonstration back in the Budha mission briefing worked... a bit.
Several people wearing suits add to the credibility of it, like the four businessmen in the Oni Alien mission, and the rapers and girl in the Ring Alien mission.
Of course, it doesn't all depend on rethorics... it's easier wearing a "cosplay" suit if you're a nerd, and there're people who think they wouldn't need to rely on that, like Togo and the karate man.