Why did ancient people use stone to make their tools?

During the Stone Age, people had poor intellectual development. Also, do not forget that they got access to iron and steel much later, and accordingly it was the only available raw material at that time for the manufacture of any devices.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.