What can warrior cats have that medicine cats can't?

Kits and mates would be a huge distraction to medicine cats. If the medicine cat had no apprentice and she got pregnant, then it would be very difficult to continue healing cats, as well as raising/carrying kits. If there was a big battle, instead of going for the heavily wounded first, the medicine cat would go for either their mate or their kits first, even if they are the least wounded.