For easy sharping
A sharp knife that doesn't perform well in "survival" tasks like skinning is useless in a survival situation. Worry about sharpening after you have gotten out of the survival situation as quickly as possible (the goal of survival strategy) and are home.
Or just learn to sharpen a blade with belly....people have been doing that in the field for a long time....you cant expect have your ideal equipment with you in a "survival" situation....thats what a survival situation is.