Sam
You don't know that. No one can know that. Look, I know you're being a very emotional mortal right now but I don't really know how to be delicate about this.
Faith was what she was. Did you not see the number of times she went up to bad guys and started provoking them? She was going to die sooner rather than later. That's the legacy of the Slayer. Admittedly I doubt she was expecting to be shot by her friend, but that doesn't change anything.
And yes, you do. You mortals are always about death meaning something. So make her death mean something.