We know the All-Spark can create new life, but it only seems to animate electronics or machines with atleast rudimentary electronics running through them. We also know that any new cybertronian life is highly agressive, as seen when Sam was attacked in his home by his recently animated appliances. If you think about it, it would make for a devastating smart bomb. If the rival world poses a threat to you technologically, their own technology will come to life and strangle them, but if they are sticks and stones primitive, you can own them easily. So was the All-Spark made with nefarious purposes in mind.