I don't think GP is asserting that the multimodal encoding is "more rich" or "more accurate", I think they are saying that the felt modality is a different thing than the text modality entirely, and that the former isn't contained in the latter.

Text describes semantic space. Not everything maps to semantic space losslessly.

It's just a description, not an encoding.

> text definitely encodes multimodal experiences

Perhaps, but only in the same sense that brown and green wax on paper "encodes" an oak tree.

Language encodes what people need it to encode to be useful. I heard of an example of colors--there are some languages that don't even have a word for blue.

https://blog.duolingo.com/color-words-around-the-world/