Thta's not surprising because people who have never used prosections don't really know how it works. I didn't know before I got to school. I'd heard people talk about it, but really didn't know much. To me it was great because I didn't have to spend hours doing the "grunt" work and we were able to finish Anatomy/Histology/Embryology in ten weeks. I got to see lots of cool pathology and get really dirty without spending hours twidling my thumbs waiting for something interesting to happen. To me, prosection is just maximizing my lab time.
Of course, that might not be the way for everyone. I've cut up lots of things in biology labs in the past and I'm not very good at it. I'll never become a surgeon-- that's pretty obvious. It's also interesting to look at a cadaver that one of the professors (WHO ACTUALLY KNOWS WHAT HE WAS DOING)has dissected, compared to one that students were working on. Either way, you can learn the relevant anatomy.