The likelihood that God did not participate in the creation of the universe is negligible (and likely zero).
If you say so, I must assume that it is true for you.
Other than that, I don't think there is any way to validate such a claim.
Why be an Atheist?
Because we have no belief in God's existence, of course.
Well, think for yourself, no matter how many garbage there is in the landfill, the rhinoceros will not be born there. From lifeless only lifeless comes - scientifically proved by Dr. Pasteur.
Uh, no.
To say that the probability of the godless origin of life is 100 percent (because we are alive) is not scientific.
Indeed, it is not. Why would a scientific affirmation refer to god at all? Why even talk about "godless"?
Trouble is, your model is not just unproven or even speculative. It can charitably be called tentative.This is the so-called "conditional" probability. Unconditional probability is negligible.