"Jack of all trades, master of none, is oftentimes better than master of one."

An average human to have an average life must know how to cook food, do arithmetic, read a book, write a letter, use a computer, learn a trade. Even living a primitive life, a human to survive needs to know and do more than any other animal. This is why we have our own enormous and very energy-intensive brains and not a shared hive mind. Being average is what we excel at as a species.