Fortunately, science does not depend on the personal incredulity of the unimaginative.
I have no idea what purpose your pointless verbose opening phrase was meant to serve. The claim is also written.
We know, from evidence, that the Earth was once inhospitable to life. It now teems with life. Consequently, life must have developed on Earth at some point. This is called abiogenesis and it is not evolution. We do not know exactly what happened and science is extremely honest is saying so. However, we know it can only have been through a series of natural phenomena. It takes nothing more special or mysterious than chemistry.
There is no other alternative. All the creation myths contradict each other, even the two in the Judeo-Christian myth system. As well as not telling the same story they all lack any evidence. Similarly, there is not one iota of evidence for the existence of any gods. We do know life did not come into existence by some supernatural force.
I do not know why you think some chemistry is far more incredulous than the suspension of the laws of physics.