"All science, even the divine science, is a sublime detective story. Only it is not set to detect why a man is dead; but the darker secret of why he is alive." -- - G.K. Chesterton via Apologetics 315
Even if science could unlock and demonstrate every step of the process leading to life and species, and even if it turned out this was a purely natural process with no detectible sudden appearances of species, no sudden infusions of information, and no detectible divine steering or directing along the way, this would be a description, not an explanation.
An explanation would still be needed for the information-systems-based natural process which leads to things such as consciousness, will, agency, moral sense, and a creature whose very essence is rooted in concepts such as good, bad, right, wrong, honor, dignity, valor, integrity, worth, value, etc.
Asking "why", sincerely and earnestly, leads to one and only one possible answer: God. And then, the game is on.
And that's the way the Ball bounces.