//What exactly is wrong with knowledge?//
This is exactly what’s wrong with knowledge:
“Then the LORD God said, "Behold, the man has become like one of Us, knowing good and evil; and now, he might stretch out his hand, and take also from the tree of life, and eat, and live forever, so the LORD God sent him out from the garden of Eden, to cultivate the ground from which he was taken.” Genesis 3:22,23
Firstly I question who ‘Us’ might be, and secondly note that God’s (the Gods’?) creations were booted out of Eden before they could get their hands on the fruit of another useful tree.