This is a pretty interesting philosophical question, and I think it basically boils down to whether you are fundamentally a positivist or not. Meaning that if we remove the sensory organs of a being (I.e., remove its ability to feel pain) that means it loses any ethical value.

If you agree with this viewpoint, then the idea of “beef worms” or “chicken fruit” makes sense. But if you question positivism and think that beings have another form of value that isn’t merely the sum of their sensory impressions, it gets much more complex.