In the last few years my two sons have faced the reality of weight control in high school wrestling. It is all about getting the edge on your opponent. Look at swimmers and divers they look like they cut more weight then wrestlers....and they shave their bodies to add an extra edge.
I know that if my son went into a match with someone who weighs more then there is a mental thing going on. Wrestlers are some of the most competitve people in the world an by human nature they will sacrifice plenty to win.