[thaumasiotes]

> and that its meaning is "Literature composed in verse or language exhibiting conscious attention to patterns and rhythm." Neither of those things uniquely privileges its spoken experience.

The patterns and rhythm only exist when spoken.

[JadeNB]

> The patterns and rhythm only exist when spoken.

Pattern can definitely exist in writing without being spoken. (Sometimes only in writing, and not when spoken; see, for example, https://en.wikipedia.org/wiki/Concrete_poetry.) I would argue that rhythm can as well, though that's less of a slam dunk.

[pests]

I feel certain poets like e e cummings require an aspect of being written as well.