This is the moderation fallacy, assuming that the middle is better than the extremes and not just as likely to be the worst of both worlds. Even if the optimum

This is the moderation fallacy, assuming that the middle is better than the extremes and not just as likely to be the worst of both worlds. Even if the optimum is somewhere in the middle, the middle region is a spectrum and the part you picked might be worse than the ends. (Picture a sine-wave shaped graph of quality vs size.)