In the spiritual realm, the opposite of ignorance is not knowledge, it's obedience.
I assure you, where prayer focuses power falls.
Most people don't think, they just rearrange their prejudices.
Heaven is a person: Jesus.
So the first reason for studying Scripture is that it is a means of spiritual growth. There is none apart from the Word. It is God's primary tool to develop you as an individual.
The goal is not to make you a smarter sinner but to make you like the Savior.