> Any security checklist should start with a description both how the machine is to be used and the expected threats models.

It states right at the top that the target audience is Linux sysadmins and their workstations.

> It has some good advice, but is certainly not comprehensive.

"This, by no means, is an exhaustive "workstation hardening" document, but rather an attempt at a set of baseline recommendations to avoid most glaring security errors without introducing too much inconvenience."