No I'm just clear that the current state of science makes it impossible to draw the conclusion that you are.
Note that this outcome goes both ways. We can neither confirm that biology is the main driver nor confirm that it isn't. Life is not as certain as you want it to be.
They're not contradictory in a vacuum. But in this sequence, they show you're backpedaling. You opened with a firm claim, and when confronted with actual data, you retreated to 'we can't know.' Pretending that perfect certainty is required here is just a dodge.
Note that this outcome goes both ways. We can neither confirm that biology is the main driver nor confirm that it isn't. Life is not as certain as you want it to be.