Well obviously, FDE also doesn't protect you if someone is standing over your shoulder reading you type the password. The point is that leaving a machine turned on, while not in your physical possession puts all of your data at risk. My company would freak if I did this and I don't even work in the security space.
As you know, the evil maid attack is something different. It's better to be precise and not give a false-sense of security to readers who may be less informed about this subject.