Well, this is one of the major risks associated with using bitcoin. With a simple mistake, one can lose all in a twinkle of an eye. One of the most effective precautive measures in keep your bitcoin safe is to keep your wallet keys as safe as possible. One method I employed is to make copies of each of my wallet keys and keep them safe. That way, I can always recover it even if one got lost or missing.
I sincerely do hope he is able to recover the coins because that's a whole lot of money to lose .
So if you lost your fiat from your pocket while roaming in the market would you blame the government for making such notes? Or if you have already read the precautions that work is going ahead so be slow and you still ignore it and accident occurs whom will you blame? The first and most important task is to backup your keys safe with you and if you can't do it simply don't hold bitcoins with you.There are many such instances and with this lost bitcoin the supply of 21 million is already reducing and according to some reports 4 million coins will be lost and 1 million coins are with Satoshi which we assume as dormant till date.So we can't blame Bitcoin for it as network is designed in such a manner and it's our safety.Decentralisation and freedom of funds comes up with some responsibility.