Proverb1 says, "The fear of the LORD is the beginning of knowledge, but fools despise wisdom and instruction."
And ten verse later it says, "How futile is it to spread a net where any bird can see it?"
And subsequently, wisdom calls aloud, saying, "If you had repented at my rebuke, then surely I would have poured out my spirit on you; I would have made my words known to you."
God said, "man has become like us knowing good and evil" with a negative connotation that this is not good so, then it can't mean that men can discern good and evil very well without God's counsel, but this is what they did when they each reach out and "took" the fruit as if it were something good. This is how man 'became' like God, even if the reality was only in the assumption, man reckoned, for whatever reason, that they possessed righteous discernment and found themselves in the wrong, having not trusted God for perpetual life.
And it took Jesus to show them right judgment, in trusting God, without restriction, for all His concerns pertaining to life, even to the point of death, demonstrating faith in God's trustworthiness in regard to His word.