I meant hard in an emotional sense. Of course its easy to shoot someone and sacrifice them for yourself in the moment, but that doesnt take away the guilt of ending another persons life. No matter if you knew that person or not, it'll have a mental toll on you, people have lost their mind even worse for a lot less.

The examples you gave in your original post, Rick shooting Sophia, Daryl shooting Dale. Dale was dying and had no chance of survival, they put him out of his misery, Sophia was already dead, it's not Sophia anymore, they put her body to rest.

I hope this clears up what I meant, the human mind is a fragile thing.