Trinitarians do not like to think that God is simple ... we get headaches when we try to understand Him ... sort of like quantum entanglement or Schrodinger's Cat or light being both a particle and a wave.This whole discussion about whether live without god is possible is predicated on the absurd notion that god is possible. It's like explaining how we designed the first airplane by reverse engineering it from the Concord.
The notion of god existing at all, in any form, means either a) that life came from somewhere or b) that god has always been. The first leaves us back where we started and the second... well it takes a problem that seems extremely difficult to understand and answers it with something infinitely more difficult that goes against everything we know in science. People like to think of god as simple. The story is. But the implementation, not so much.