Eventhough I understand your point, how can we mimic something without acting accordingly? The fact that we guided it doesn't prove that it was guided, all things that happened could happened by chance too. This wasn't the point of this experiment either, it was to show how these aminoacids could have come into existence, wether guided or not was not part of the experiment, since you can't mimic an uncreated and into existence comming by chance of aminoacids within a human lifetime...
Everything we do can be seen as 'creating' or 'guiding things', in this case it's a bit strange to say we may do nothing but throw all ingredients together and wait, since that's most definately not what happened. (Infact, like you've said, an experiment like that, will do nothing, because nothing happened.) There's more needed to trigger an effect, and since we could not wait for chance, they helped a bit. This experiment doesn't prove it infact happened by a creator, since I doubt a God would have used glass tubes and heaters, so tell me, exactly how did he do it?

Cheers