Exactly. I think this advice has everything to do with how far your eyeballs are from the seat of your chair, assuming good posture.

As a tall-ish person, the "standard" position for a laptop screen or old-school CRT absolutely tears my rear neck muscles up. Eyeglasses have a lot to do with this, as the focal point is dead-ahead, so I have to crane my whole noggin down to see clearly. This all creates headaches by referring pain to my scalp and, strangely, sinuses and eye sockets. I might be okay with looking down past my nose with bifocals, reading glasses, or contacts as the illustration shows, but here we are.

I'm in an in-between camp because of the above. Good posture, chin up, looking dead ahead to an elevated screen through glasses. This also works in the standing position too.

As somebody dumb enough to have ended up working in dtp, I also say "yes" will very quickly saddle you with an aspirin addiction.