Just because we haven't to this point doesn't mean we won't at some point in the future. I mean, how long have we been playing with things at the cellular and atomic level? Several decades? And look at how much we've done in the past few decades - it's staggering how quickly we've made advances in knowledge and technology. But because we haven't yet created a lab-grown human that's proof of the existence of god?
And actually, we have created life in the lab. Ever hear of Dolly the cloned sheep?
Also - it's "presence" not "presents".
On a slightly related note, I've always found the Simulation Argument to be interesting:
http://www.simulation-argument.com/simulation.html
It proposes that at least one of the following statements must be true:
1 - Humans are likely to go extinct before reaching a post-human phase.
2 - Any post-human society would be extremely UNLIKELY to run a significant number of simulations of their evolutionary history.
3 - We are almost certainly living in a computer simulation.