you have to remember you would not just be given a knife and a pig............... its something you would be trained to do to do it as quickly as possible.
and during that time you would be hardened off to it.
i dont buy the idea that if you cant kill an animal you should not eat it anyway. I get the logic and even have thought that way myself as well...................
but there are plenty of jobs i either mentally couldnt, or at least i wouldnt want to do......... but i would have no hesitation of using the services if i had to.
(Paediatrician for one................ I did strongly consider a career change a few years ago to go into nursing , then i briefly dated a sister from addenbrookes hospital and decided it was not for me)