When I speak of spontanaity I speak of animals or plants popping into existance from nothingness. What you are talking about are pre-existing materials organizing into lifeforms these are two quite different ideas.
The next time a new species appears miraculously in your living room give me a call. I know new species can form, just not from a vacuum.
In your version of the universe in which God has ultimate creative power, we could wake up tomorrow morning and the moon could be covered with a rain forest inhabited by pygmys and leopards.
In my version of the universe this is an impossibility in such a short period of time, and would require eons for the moon to develop an atmosphere, water and other requirements for carbon based lifeforms as we know them.
Which version of reality do you live in?
> it requires that at some point life spontaneously erupted.
Again... scientists have assembled viable virii from simpler chemicals. The scientists didn't use magic or spells or mysterious incantations to bring these thigns to life; they simply put them together. Life, then, is simply a matter of being a sufficiently complex chemical structure. Nothing mystical about it.