It would be easier if cells had an intelligent designer and weren't just soups of chemicals that interact in millions of ways.
From the argument from design:
> One looks at a simple computer, and sees evidence of intelligent design.
> One looks at a Sun Sparc 20 and... um... well... Okay, One looks at a DEC Alpha and sees evidence of intelligent design.
And from the counter argument:
> If you think the network implies intelligent design, you haven't seen our network.