Early humans used rocks as tools to make other things as well as to construct buildings. Why was it better for them to use rocks than another material such as wood?

During the early stage of life, early human can easily find rock as the means and ways for hunting, building houses, making fire, etc. Compared to wood, rock is stronger as you look at it. Stone has been widely used in variety of tools such as spear points, arrow heads. The accessibility of rock is greater than any other materials.