It’s interesting that you do recognize function/purpose, and you do not accept artificial ones (even excluding humans existentially defining their own essence). Biological life on earth is new on the scene of the universe — why do you recognize “just so” stories about biological function/purpose, but nothing beyond those stories, especially considering that there would be no mechanical computer programming without a programmer (mind)? Mechanism (not the same as function/purpose) is ordered—to denature something is to break the mechanism/order so that it no longer functions according to its purpose. How could it have become what it is in a stepwise fashion if changing it makes it no longer operate?
Culture would not exist if consent violation was the norm/order. Disorder is cultural breakdown from primary consent recognition. If you think violation is primary, Who tamed us? But the thought self-destructs because you can only violate what is there to violate. If you don’t recognize consent, there is nothing to violate.
The eternal end in every moment is communion, and our breaking it did not change that. Eternal communion subsumes all change, because communion (consent) is more than blind mechanism & requires choice to demonstrate it.