Why are fingers made of small bones?

It is the small bones that provide mobility to the fingers. They evolved this way as a result of evolution. After the human ancestor descended to the ground from the tree, he stood on his hind legs and freed his hands. It was then that they began to evolve, becoming the ideal mechanism as we know it today. And objectively it is believed that it is the hands of a person who are the most perfect among all representatives of the animal kingdom.