Re: "[..] demonstrates again that brain wallets are not secure and no one should use them."
That's the whole point of crypto currencies though; trust no-one (except yourself and the maths (and the group of large miners who de facto set the rules)).
For there to be a fall back option, you need to trust someone to be the central bank and have access to everyone's money. At that point you may as well use a real bank and a real currency.
So either you do make a backup and store it in a separate "Availability Zone" (your mum's house) or you accept that mindwallets are like cash, let go of a bank note on a windy day and it's gone, no fallback.