and therefore attaching a superlative such as "saddest" to it makes no sense
I ignored the title of the thread; I was concentrating purely on the video.
But while we're at it, I don't understand what you're getting at, aknerd. How are you assessing the magnitude of a tragedy? I think it would be an error to attempt any kind of objective measure, seeing as 'tragedy', by definition, is used subjectively in conversation. A tragedy is declared by a person expressing their feelings, and it is the feelings that are only loosely "measured" by a rationalisation. It would be worth noting that I have never used the term "tragedy" except to describe the literary genre.
if we don't care about another's death, why should we care about another's loss?
Empathy.
First, some semantics: nobody is
obligated to care about another's loss. However, empathy, the basis of all personal relationships, is what has us identify with somebody's experiences and feelings, and evokes the same feelings in us (if we are so equipped).
Because of the various common pathways and experiences in our lives (expressed as concepts), we communicate and share this empathy, which is what generates the sense that one might be required to care for another's loss. In turn this is what engenders that question: "I do feel bad that gran died, but I don't feel all that bad because I barely knew her, does that make me a bad person?" Given my opening sentence, no, of course it doesn't!
Just as it doesn't necessarily make you a bad person if you don't feel bad for the dead car
or the grieving cat. Others might like to assert this, indicating that they are upset by something and are upset that you don't share their feelings. I can't feel bad for a dead cat because I can't feel bad for anything dead: I can't identify with the state of being dead (duh). However, I feel bad for the living cat because I assume that it is grieving, especially since I've been in similar situations with dead friends, dead patients, and my dead father, who was killed in a roadside accident and I identified in the morgue. He, too, was roadkill, but I was still there.
This is why I also don't understand what you mean when you said that the grieving cat is "obsolete".