I didn't say that they happen the same amount, I said they're equally risky.
And you wouldn't know if you killed your snake with f/t, thats why you don't see stories of it really. (i've never seen one either). How many owners/breeders get autopsies done on dead snakes to determine what killed them though? You wouldn't know what killed it, unless you had an autopsy done to determine the cod was an improperly thawed rodent. Not a ton of breeders would be that willing to do that, they'd probably just write it off as something else.