Yes, and game design also provides some very good examples where people not thinking broadly enough can lead to serious problems. One good example of this is Dungeons and Dragons 3.0, where the play testing occurred with characters all playing as certain archetypes (the fighters hit, the wizards throw fireballs, the clerics healed in combat). As a result, no one noticed that minimal amounts of tactical sense could make the wizards and clerics massively outshine the other classes.