$3 billion won’t cure half of the hundreds of different cancers, let alone everything else.
As for Z, hey he’s young. His life experiences so far have probably not been the kind to instill great wisdom. Give him time, maybe he’ll mature better than we expect by 40.
He’ll learn more important things in the next ten years than he has learned in all his previous ones. Maybe something good will leak in.
He stole Facebook from the people who developed in when he was an undergraduate at Harvard. He's a piece of work.
Hardship builds wisdom. I doubt Zuck the shmuck has had to face much hardship and with his billions he’ll never have to face any. So when he hits forty he’ll still be quite a baby I bet. Just an immature baby with a lot of money to blow. And He ain’t taking one penny with him.