> all that matters is that it's correct and easy to read

Absolutely disagree. A lot of the best docs I've read feel more personal, and have little extra touches like telling the reader which sections to skip or to spend more time in depending on what your background is.

Formatting and layout matters too. Docs sites with messy navigation and sidenotes all over the place might be "easy to read" if you can focus on only looking at one thing, but when you try to read the whole thing, you just get a bunch of extra noise that could've been left out.