>>Because they stop at Darwin and never gave any thought to where everything came from<<
I know of no atheist that does that. Perhaps you can provide a reference?
People who understand science know that TToE and abiogenesis have nothing to do with one another any more than astronomy, geology or any other Natural Science does (although astronomy does brush up against it).
The key is people who understand science. Most don't. They just assume the assorted Deepak Chopras, Carl Sagans and Bill Nyes they look up to know science and are honest brokers of knowledge.