Why does reading makes us human?

Answer 1

From a Western, or simple Aristotlian perspective. . . quite possibly. If by perfection, we mean virtuos.

Reading and writing are ways we share experience and culture. Stories and dialog that may pass along technical wisdom like how to care for cattle, or moral wisdom like how we might get along with each other. Growing in moral and intellectual virtue may surely lead one to perfection Aristotle might say . . .

Answer 2

To human knowledge, we are the only species that "reads": involving the brain, eyes, and emotions with written words.