Most humans dont know how to walk when they first get their legs either, Free. She had to learn, and took the time to do so. I can't say if they knew this would anger the gods, but I also imagine they wouldnt care. Just because they exist, doesn't mean everyone is inclined to put their faith into them. And in this instance, enough if these atheists gathered to more or less try their hands at the whole "manipulating life" thing themselves. Why should the gods be the only ones to decide what can become what