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Look at it this way: life on Earth is composed primarily of C, H, O, N , and a number of trace atoms.

If life evolved here on Earth, then somehow, CHON+trace all self-organized into all of Earth life today, including us, and all we humans have done and will do in the future.

Now: say we could go back just before life evolved. Even with very very good data, and with whatever talent (AI, science, anything) and technology from today, would we be able to truly describe the emergence paths for those CHON+trace atoms?

Impossible. This would be far beyond our level of science and technology. We can't even do this for much simpler systems and shorter time horizons. You'd have to predict the emergence of life, the full properties and behavior of all forms of life in the last 4 billion years, and last but not least, humans and all that humans have done and thought since then.

Yet clearly nature emerged all this from perhaps small amounts of 11 elements or so. Complexity is one of the greatest unknowns in our present civilization.