I believe it is a personal call that each and every one of us need to learn how to make (it’s not easy).
Some people are trying too hard and do not realize that prolonging life is not always the best nor the most human option for the animal.
Culling does not (always) mean being heartless and cruel in some cases it means being human and having mercy still doesn't make it easy to do but it is one side of the hobby that anyone that breeds will have to face sooner or later.