Old people singing really good songs poorly does not amuse me. Only thing worse would be children singing really good songs poorly.
As much as that was the point of the film, that wasn't the point of it at all. It's about what sustains you after every else is the world has been stripped away from you.
Imagine a time 50-60 years from now. All your friends, parents, siblings, aunts and uncles are dead. You've been out of the work force for 20 years and you're completely irrelevant. You are in constant and sometimes unbearable pain. You know you will be dead within ten years. People who won't even be born for three more decades will be marginalizing and condensending to you everywhere you go.
The fact that there still could be some hope, some will to get up out of bed in the morning was very inspiring to me.