Except abiogenesis didn't occur on Earth in few billion years, but within half to billion years after Earth was habitable. All the other features of life have t

Except abiogenesis didn't occur on Earth in few billion years, but within half to billion years after Earth was habitable. All the other features of life have taken four billion years to arise through evolution. It is like looking at current cars and wondering how they could come from nothing where had to look at the original cars and hundred years of improvement. Abiogenesis really only need to explain how the first life arose. It could have been really simple since it got out competed by more sophisticated descendant that took over planet and left no trace of original life. We don't know how it happened, if required lots of random chance or if there was a replication step that made if go faster. We know that evolution can make complicated stuff over time.