I remember asking my sixth grade teacher, at the Christian school that I was attending, why God would put the Tree of Knowledge of Good and Evil in the Garden of Eden? My reasoning was that it was unfair for God to create these inexperienced beings, artificially insert this random prohibition, then place a demonic, and infinitely more sophisticated, tempter in the garden with them.
I was unsatisfied with the answer.
That is one of the questions that we bring up in the book. We bring up these questions not to provide an answer, but rather, to provide a fresh perspective to approach the issue from.
I would guess that many might take issue with our use of the two trees placed in the garden as a gateway for interstellar travel, but I would hope that by coming up with an alternative way of looking at the problem, you, at least, wrestle with the issue, and hopefully draw your own conclusions.