I'm not saying that biologists should have to think about QM, just than biologists should think about chemistry. Our understanding of gene regulatory networks (which are definitely an emergent phenomenon), for example, has, until relatively recently been very qualitative, but we're now reaching the point where they can be simulated with relative accuracy from chemical principles. This is great, as it allows us to ground our assumptions about gene function and ask "Could this system really work the way we think it does?" Sometimes the answer is no and models have to be revised.