Well, okay, first I am amazed at either the chutzpah or the intellectual deficiency involved in saying "it doesn't excuse it".
Of course it excuses it. Things that are inevitable, if you actually meant that, have no ethical significance because _they're fucking inevitable_ . It's like trying to make moral claims about the actions of gravity or the electroweak interaction. They are what they are and it is literally impossible for them to be anything different.