There is simply no way that people perform (or be) as average as anyone else. A bell curve is just a plot: a mathematical visualization.

An often overlooked thing is that one on the left side of the hill may brighten the day of the one on the right side of the hill. For a random image: maybe that "lefty" likes plants more than the actual work yet, as he walks around, is the perfect target to bounce of ideas (he has to have some work related talents) to see how they may get received even before doing some alpha/beta testing in the wild. As such this may informally connect different aspects of a group. Boot the "lefty" to boost "righties" and a new bell curve will arise. Likely on another curve showing more stress, more internal competition, and less solidarity.