If someone reads a lot, it is taken for granted that the person is knowledgeable and most of the time it’s true too.
But we should not confuse wisdom with the knowledge. By reading someone can gain the knowledge but wisdom comes only from practicing the knowledge. Without going in depth, and without practicing, knowledge is just the theory.
To turn knowledge in to wisdom, the most important aspect is putting the knowledge to the right action and to keep acting on it until you gain the wisdom.
Read with the aim of attaining the wisdom. Only then the reading is meaningful.