Yeah... I agree with this and, fortunately, have my husband do the dirty work but if I ever do have to I'd do it VERY quickly and move on and remind myself that they are livestock and they don't have feelings. Still, very hard for a tenderhearted person! For a lot of chicken people it's not about husbandry but about pets.
I grew up on a farm and our livestock are treated just as our pets. Any animal that needs to be put down gets done. I've had to put horses, cattle, dogs, cats, and birds out of their misery all well by my teens. It's part of life.