Yeah, it doesn’t really belong in the ‘no’ column. It’s not an appropriate cat food because it’s not nutritionally complete.
So it’s rather like how just eating bread or cornmeal that don’t have added vitamins will give you scurvy or pellagra. But obviously they’re not poisonous or anything and most of the world eats them without a problem.
If that’s something that regularly happens in the US, do you have any examples from the last decade, instead of three examples from 55-60 years ago?