I don't think this has anything to do with the warning, but there was an interesting factoid on (I think) the Netflix Series Cooked...
If you have only flour and water and eat the flour and drink the water, you will be dead in about two weeks. However, if you mix the flour and water, allow them to ferment, and bake it into bread, you can live on it indefinitely.
I'm not sure if that's true, but I believe that was what was claimed.
Edit: I took this as a nutritional claim, not a food safety claim.
