That’s exactly what I said. We have those words (false, grammatically incorrect, etc) because we have a more particular sense of language and identify more nuance in how language fails for us than how images fail for us.
It's more that nonsensical language is meaningless, because language has so little content density to begin with, so losing a little loses almost all of it, whereas a mishmashy picture has lots of pieces of meaning, even if the whole is a mess, because images are far more information dense.
Text generated though we want not to be just a pile of recognizable words but to follow some pretty strict rules and to actually be true.
Imagine you insisted stablediffusion only produce photorealistic images and judged it for every inaccuracy.