Was the Bible that Luther received inerrant (without error)?
If no, then Luther's doctrine of "The Bible Alone" is self-refuting.
If yes, then the source of the Bible, the historical entity that wrote, preserved and canonized it, must have acted infallibly in doing so.
It's one or the other.
So the source of the Bible acted infallibly in writing, preserving and canonizing the Bible. If true, then the historical source of Scripture must have acted infallibly over the course of many centuries, because the Bible was written, canonized and preserved over the course of centuries. For the Bible to be free of error, every act of writing, preservation, and canonization would have to be free of error.
What could this error-free source be except the Church of Jesus Christ, the Universal or Catholic Church? The Church which Scripture calls "the pillar and foundation of truth"?
Not so because the writers of the Bible never instructed men to add tradition to Scripture.
Jesus condemned tradition in many places in the gospels. Why would He then go back and add it again, or instruct it to be added again?
And if so, where did He instruct us to add tradition to Scripture and hold it in equal esteem?
He constantly referred to Scripture to validate Himself. Why don't Catholics follow His example?