Look no further than the history of 'Christianity' and your answer is hiding in plain sight.
Who was the first Christian? Did this person become such by reading something like the Bible? Or, were there so many debates, arguments, controversies about who said what to whom that a NEED arose to "prove" things.
The first hack at a Bible came from a person named Marcion. Yes--THAT Marcion!
He was Gnostic and eagerly embraced the only 'Christian' writings available (letters from Saul (Paul) of Tarsus.
Marcion tossed out writings about the raving lunatic God of the Hebrews (Yahweh) and assembled Paul's letters into reference.
For awhile, Marcion's side was winning. But, the early Christian community calling itself Universal (i.e. Catholic) excommunicated Marcion and--not unlike the Governing Body of JW's today) marginalized Marcion as Apostate.
4 to 5 HUNDRED years passed . . .
After much arguing and in-fighting, a Bible 'canon' was collected.
This became--by men's decree only--the official BIBLE of history.
Would you like to guess how many books it contained?
There were more than we have today!
Under the 2000+ year history of the Universal Christian Church (i.e. Catholicism)
Christians got along just fine without ever reading their Bible. Their Governing Body told them all they needed to know!
Protestations by the monk, Martin Luther, led to a great upheaval and the splitting of Christianity into a do-it-yourself group of Protestants.
Their unique claim was naive: all you need is the Bible, prayer and the Holy Spirit.
The result?
Today, we have over 41,000 separate denominations with differning interpretations of the SAME Bible!
So, now--please ask that question again, won't you?