The USB section of the install guide:
is somewhat duplicated by:
It seems like these pages should either be consolidated into a single guide, or the install guide should cross-reference the wiki page for people who need more detailed help.
This is by design; the Installation Guide is intended to be (as much as possible) a stand-alone document. And not everything on that wiki page is relevant to people creating a live USB drive to use during installation.
Thanks for the catch, though!