Scripture requires both law (this passage) and gospel. Like an airplane, both wings are required.

With this passage, it's important to remember the gospel (the first gospel message recorded in the Bible) that comes in the next verse. In the KJV: "And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel." Her seed is pointing to Christ, who defeated Satan and thus reconciled Adam/mankind with God.

This is what this passage is about. It's important to not get bogged down in man's translations which are errant and malleable as language is limited and malleable.