You want us to tell you why you should shoot an animal and feel good about it. ....
No one but you can make that measure. I can't say that I ever feel good about any kill. Instead there is a feeling of satisfaction that I have done my best on a particular hunt. If I broke it down to the kill level and it's success, I would have hung it up a long time ago.
By my measure, hunting is not a "sport" instead, it's a way of life. It's a total picture of preperation, learning outdoor and shooting skills. Knowing abut the game you hunt, cleaning and cooking. It's also about demonstrating responsible and ethical hunting.
I teach Hunter Safety for the state, mostly at the M/L station. I also teach hunting ethics. I don't promote hunting nor glorify firearms. Some students are surprised when I tell them that they don't have to kill animals nor shoot any firearm. But if you do, then do it in a responsible manner. ...
It's private, personal and entirely your call ....
Be Safe !!!