Being able to decipher the tone of a piece of writing is crucial to being able to decipher the thematic message of a text. This is absolutely true for analyzing poetry.
Love it or hate it, poetry is unavoidable in the secondary ELA classroom. I, for one, am a HUGE lover of poetry but fully acknowledge that it can be annoyingly cryptic at times. Reading poetry reminds us that not all texts are meant to be beat "with a hose to find out what [they] really mean" like in the Billy Collins poem "Introduction to Poetry."
In screenwriting (writing for movies and TV), the logline is key to brainstorming story ideas and also selling them or "pitching" them to buyers. Crafting loglines can help the writer to flesh out new plot ideas before writing the entire script. It's much easier to revise the logline rather than an entire hundred page script!