I think my biggest worry with artificial sperm is not so much taht they are playing "god' but--what about our inherited DNA memories?
Instincts, our biology---for example, our diet has changed drastically since humans have evolved (and we are evolving still).
Now, as for them playing God, I believe that God gave us the ability to manipulate our environment, of all His amazing creatures, we were created for that purpose. We, as humans, were told to go forth and populate the earth. That is what they are learning to do, and if they can make better ways for humans who want children to have them, why not? It says nothing in the bible about humans creating humans, in fact, my understanding of the bible is that it encourages us to be like Him, and it encourages us to be parents.
PS Markey: It was terribly hard to resist those un-eloquent comments!!!
PPS: Carlotta: There has never been anything "Safe" about science.