It's not "splitting hairs" but a logical argument. When Pre-Scientific-Age "Natural Philosophy" was partitioned into "Physics, Chemistry, Biology, Mathematics" etc. there was an understanding of their boundaries (though technically there are none and everything could be argued to be just Physics) and the Nobel prizes were designed accordingly. Now of course we know better and it might be time to come up with something like "Nobel Prize for inter-disciplinary/cross-disciplinary achievements" with the disciplines listed out. So in this case it would mention Biology/Physics/Mathematics/CS.