0.9 bitcoin got lifted off the uncompressed address 20 minutes after they deposited it.
The other possibility is that this is a particularly stupid brainwallet, rather than flawed software.
that will never happen with dice rolls no matter how bad the dice are biased.
True, but you are simply trading one set of potential vulnerabilities for another. Just because thus particular one is impossible with dice, does not make dice inherently better or safer.