Life starts with a standard of evil? That's not any brand of Christianity I know.
For me, I think life starts with imperfections. An exhortation to do good is not necessarily ludicrous. What can be, is how that exhortation is delivered.
I am a Christian who believe that the biblical creation story is a fable -- and a BRILLIANT one! Kudos to the writer (or writers / editors) who summed up our human psyche in just a few pages!!
Notice how God didn't tell us not to jump off a cliff (something with obviously unpleasant consequences). God said, simply, don't eat the fruits of this tree. No obvious harm, basically, no reason, except "because I said so".
So right there, the author laid a scene that exposed our human nature to the core! EVERY parent knows what happens when you tell a kid not to do something, just because you said so!!
And in that fable, God said to himself... now that humans have tasted the tree of knowledge, they will want the tree of life. AGAIN, an exposure to another of our basic human traits!! We want knowledge, yes, and immortality too, and we want to be our own masters (for better and for worse)!! Think about it... now that we are at the cusp of stem cell research, for example, do you think we could really stop our research and say "hey, could be dangerous, let's leave that one alone"? No way. That's just not how we humans are wired.
So, reading this fable and teasing out the messages, I am truly impressed with whoever came up with this wonderfully simple story -- as a means of pointing out our human nature oh so incisively. Like Buddhist scriptures, SO MUCH of our sorrows -- what we do to others and what we do to ourselves -- stem from our insatiable wants!
How can a person who can be so nice also be so evil? The author(s) wrote a short, simple fable to describe our basic goodness -- and how we sometimes override that with our limitless desires -- and create troubles for ourselves and others. And that was done 3 or 4 thousand years ago!!