So you're basically saying to not be emotionally attached to anything and anybody, because it's just a waste of time to sulk.
Say if someone's wife just died, it's cool. She did mean the whole world to him, but meh, nothing he could have done about it. He'll just find another girl tomorrow at the club, so it's okay. No point sulking.
And of course, the details of how she died don't matter either. Police called his cell, told him his wife has passed... and he immediately hung up.
She dead, so she dead. I'm good with that. Already over it.