[orev]

Because a writing app supports the act of writing. Once you’re done writing, you don’t need the app anymore. And when you’re in the act of writing, things are often not linear. You might come up with headers first, and fragments of text, usually in the order they pop into your head, not the order they need to be in the final copy. Then you wordsmith and reorder things to get them into a progression.

And in Word you can always collapse the section and then move it around with all of the text.