Even in science there is a fair amount of subjectivity to the prizes. It was fairly questionable to give a Nobel to Kary Mullis for PCR, for example (the technique is certainly useful, but maybe not that deep scientifically and Mullis is kind of a nutjob who has used his fame to promote pseudoscience), not to mention prizes to work that hasn't held up well -- frontal lobotomies are not considered a great solution to mental illness anymore despite Egas Moniz's 1949 prize for it.