I think the 'what is being done for the old parents' is them not having to confront and part with their stuff while they're old but alive. By doing this after they have passed, they get to bypass this possibly mentally taxing task. The value add is debatable. I personally love to get rid of stuff, so it's hard for me to imagine how much of a burden it is. But the point makes sense.
Thank you for saying this. I can't believe the points people are making here. Your parents are already dead at this point. Of course it does nothing for them. Taking care of them while they're still alive does something for them, but once they're dead nothing can ever affect them again.