Religion offers very simple answers - science offers new possibilities. Did we indeed rise out of that primeval goo by coincidence, or are we the result of divine intervention? If you take the religious stand, Man was made at the end of a week's hard work, and God was pretty tired.
Imperfections, flaws, weaknesses, vulnerability - that's the price we pay for being the last item on the assembly line. No matter which version is right - if you can improve on this prototype, that not even evolution has peifee ted yet, by means of science - create a sharper original instead of this sloppy copy, this mortal coil - why not?
Ask yourself - what's worth living for? A lot. What's worth dying for, then? Not a lot. So if you had the choice, it wouldn't be that hard, would it? It would be worth killing for, wouldn't it?
Life is a blessing, but death can be a friend - there's always a price to pay. In nature there's neither good or bad, right or wrong - there are consequences.
Not so long ago, a few able scientists were willing to assume the cape of the creator, delve deep into this creational abyss to find the secrets, to stretch the known boundaries, to create life - they could not foresee the consequences...