Another thing to consider regarding your
@humblepie is what the situation was in the natural world in which Jesus and his disciples walked. Many people were unable to read and of those who could, not many could afford to own much less carry around the scriptures which would have been would have been in the form of bulky easily ruined scrolls. There were printing presses and the only way new "books" of any kind were "printed" was by the long tedious process of long hand writing or printing. How long would it take one man write out the Old Testament by hand? So how many completely copies can we suppose were readily available?
So now we have printing presses in the world and even our own printers at home. We have access, in most western countries to relatively inexpensive books of all kinds, including Bible. In my town some of the second-hand stores don't charge for Bibles available. If you want a Bible, simply go into one of those stores and get one.
So then to your question, "why do you"? What has God give us? He has given us time. He has given us a body and a mind. He has given us everything that we have. Why do we use any of the things that He has given us? Why don't we simply kill all of the babies and younger children and then all of us commit suicide?
What is contained in that book, the Bible? Why would we want to have it with us and eventually in us, written on our hearts?
If we have read that Book, we have a idea of what kind of a person Jesus was walking on planet Earth. Would we not really desire to be like him? So then we keep on reading that Book and ever carrying it around with us in book-form or in a small computer-type device so anywhere we are we can eat and drink what God has to offer: the Flesh and Blood of Jesus.
"Beloved, now are we the sons of God, and it doth not yet appear what we shall be: but we know that, when he shall appear,
we shall be like him; for we shall see him as he is." I John 3:2
To become like Jesus, is it not a good idea to carry around the words that speak of him so that we are able to regularly partake so that they will come to Life within us?