I don't know if it's sad; it's a different story, it's a kind of riff on the same themes.
In Genesis III, it's necessary for Adam and Eve to acquire knowledge and leave the garden, because in so doing they have sex and make children. While in the garden, they didn't know they were naked, and presumably didn't have sex or reproduced.
Also, when God finds out, he fist asks the man, who accuses "the woman you gave me". So then God turns to the woman, who says the snake deceived her. But here God stops his inquiry. We know the snake can talk because he talked to the woman, so why didn't God ask the snake why he did what he did?
An interpretation is that the snake ("the most clever of all animals God had made") is in fact God's instrument. He works for the boss.