The story of Genesis is actually even more confusing than just an entrapment story.
It actually destroys theodicy. Look. The typical explanation for evil in the presence of an omnipotent god, is that he allows us free choice. BUT free choice requires knowledge of good and evil, as you point out (a moral choice that you are not tricked or compelled to take). Hence, the devil/serpent gives us free will. not god. Therefore, saying "god gave us free will" and that''s why he can't destroy evil, is incorrect. He punished us, allegedly, for adopting free will (whether we have it is moot to this argument, the point is: the story actually destroys theodicy). This implies that to do evil... you have to have free choice... and therefore to be suitable for punishment, eg. the fall of man, or the expulsion from Eden, you have to... eat of the tree. IE either it was planned (entrapment), or, punishment is not warranted, because the eating occurred BEFORE man had free will.
Another fun thing is the "elohim" word at the start of Genesis (in the beginning there was God). The hebrew has "Gods". Evidence supporting this position is because on seeing that the people have eaten of the tree, God says, "now they are become like US knowing good and evil". Meaning, there is not one god, EL, but ELOHIM, plural. Perhaps the serpent (dragon, I assume, because he originally had legs), was one of the Elohim. My view on this is that this stuff in the text is an anachronism dating back to pre-monotheistic days and it was simply not excised due to copyists being pedantic about keeping scripture sacred, rather than editing what did not make sense.
