“So to avoid addressing those inconvenient truths, you (they) shove it off the plank into the murky and ambiguous seas of “abiogenesis” and claim it’s not part of evolution.”
You are absolutely right that if you reject supernatural causes, you must accept natural causes.
This does not mean that we know in detail what a given cause is for all given effects.
What we can demonstrate is that over the history of civilization, the number of things once considered to be of supernatural causes, like disease for example, has gone down and the number proved to have natural causes has gone up continuously.
Further, there has NEVER been a single thing proven to be of supernatural origin.
The evolution of chemical complexity can be demonstrated in the laboratory. Simple viruses have bee created by biologists. The mechanisms for evolution of species has been demonstrated experimentally, and proven to my satisfaction by genetics.
So, what we are left with is the knowledge gap of the cause of life between viruses and prokaryotes. This gap in scientific knowledge is where you say God lives. In my opinion, it is just one more subject for science.
When faced with the choice between science and magic, I choose science. This is not due to some emotional preference; it is baced on the fact that in the past, I would have always been right to do so.
And every single one of these demonstrations involves a human mind.