This is due, at least in part, to the fact that it's considerably easier to track down card thieves, whereas Blizzard is largely focused just on getting the acc

This is due, at least in part, to the fact that it's considerably easier to track down card thieves, whereas Blizzard is largely focused just on getting the accounts back in working order for their customers (and, as mentioned in this article, preventing them from being stolen in the first place).