There are some Christians who are Bible-ignorant. They have the faculties to read and comprehend what they read, yet they choose not to.
Maybe it is good to have such faith - not looking for proof or affirmation. Kinda childlike.
Does the Bible bore them? Does it scare them? Do they not read it because their church tells them it is irrelevant either openly or subtly by its actions?
Will those who have never read what Jesus has to say, even though they are able, recognize Him when He returns? Can you really understand what you believe if you don't study it? Even a little bit?
I use to belong to a "country club" church. And I can tell you from too many years of personal experience, liberal protestants don't read the Bible.