Surgery is important but was the work of the medieval surgeon experimenting on corpses really relevant to the modern understanding of medicine? Probably not when they were concerned with the source of the four humors or whatever it was, and had zero concept of germ theory much less cellular biology. We are spending too much money and effort on process that will no doubt be obviated with a future technology. We are still very far from having a sustainable method for human settlement and colonization, and having people poop in bags on the iss probably isn’t advancing much understanding in those technologies beyond what terrestrial experiments and simulation could do.