Here we go again. I can see it now... That 'Bitcoin User Not Affected' meme will be making a comeback.
Mt.Gox goes bankrupt after theft. Bitcoin User Not Affected ... oh, wait.
If you don't have the private keys, you are not a bitcoin user. You are a creditor to someone else and own no bitcoins, you just own IOUs.
Yeah, right. And if you dont have all your gold and cash hidden in your room you arent a "gold or fiat user". Yeah, thats gonna be safe ..
oh, wait. Wouldnt really be a difference if there had been a piece of paper with a couple of numbers on it found as well.
Just because you don't want to deal with reality does not make it untrue. You are not a bitcoin owner if you don't have your keys, you are a creditor to someone else. Period. You don't own bitcoin without the keys.
If one is too incompetent to manage the security of your private keys, then perhaps one should just put one's money in a bank and let someone else manage it for them and have it subject to haircuts, bail-ins capital controls, exchange controls and the like. Zeroday knows the difference which is the point of this thread.
That is one place where bitcoin is different, I'm sorry you aren't aware of this feature of bitcoin.
There are things like bip38, brain wallets (often a bad idea) and others where it would have been much different than the story you linked to.