The answer to "is it society or biology" is both. And it will always be both, because you can't change biology and you can't "balance" society without being able to disentangle biology, and disentangling biology from society would violate both causality and the Heisenberg uncertainty principle. Even measuring how much of each it is has the same problem.
People want to say we just need better evidence. We just need to measure it better or be more diligent or think about it more carefully. But it isn't that. It's that the problem is NP-complete and n is large. It may even be incomputable because some of the necessary information was lost to history and not knowable.
Which is why it's a political football. People choose their team and see how far they can run with the ball, because the score isn't based on science or math.
Yes, of course. Really, for all the talk about convoluted biases clouding people's decision-making, it's pretty telling that most of the time, they don't even manage to get past the basic challenge of actually letting the evidence lead them to a conclusion.