They could not have knowledge until they were saved.
Do you think these disciples were saved? They had knowledge but walked away from Christ. It isn't knowledge that makes the difference, it is faith, and faith comes only as a fruit of the Spirit through becoming born again,
You keep ignoring the eternal part of eternal salvation.
[Jhn 6:64-66 KJV]
64 But there are some of you that believe not. For Jesus knew from the beginning who they were that
believed not, and who should betray him.
65 And he said, Therefore said I unto you, that
no man can come unto me, except it were given unto him of my Father.
66 From that [time] many of
his disciples went back, and walked no more with him.