We can all see the various pieces it takes to build something and know the odds against it falling into place, how many various possible other ways it could have failed. That gives an astronomically large number against life happening, but it is far worse than that if you look at it from the perspective of a bottom-up problem for chance and necessity to do the work. As blind chance doesn’t know what is required for step one, two, three, and so on. That would be like finding a needle in a haystack, without knowing what a needle is or what a haystack is. And through chance and necessity, still getting it right while overcoming those odds when we know what is required without knowing what was needed, or even what a need was.