We need Chris in there to being us some sanity and normality. The HM's are so wound up and the atmosphere so tense that it can get uncomfortable. Then we see Chris casually strolling by two HM's who are going at it hammer and tongs and he has a little tolerant smile on his face and it's like "Whew! There's Chris, and he doesn't give a monkey's!"
It's like he's living in a parallel universe in there. There is him in his own sane world and everyone else in the crazy loony bin created by a few HM's but which doesn't touch him. He observes their world from the safety of his own.
It's a brilliant contrast and it could win him the show.