You're right. And I think there's an element of the shows producer picking the 'tards so the viewers can feel better about themselves.That seems to me applicable to all contestants who go on shows like Tipping point or the Chase. Some of them , men and women , are absolutely only there to be on TV.
You'd run out of contestants in one programme.Game show idea:
5 men are sitting alone in silence. Very contentful. Watching a match, reading a book, whatever.
Their old dolls have to sit in the same room quietly. They are also allowed a book, TV, whatever.
Last old doll to start nagging her fellah wins.