It‘s phrased „warns“ because it is just assumed that no one will eat. Because apparently that‘s a normal thing to assume in our society. That we‘ll all just starve to death soon.

I don‘t think we will but it‘s telling that a lot of rich and influential people do and are not only letting it happen but actively supporting it.

The good news is that the guiding document for the AI robots will be called "How to Serve Man". The bad news is it's a cookbook. :)