I always laugh when I read these articles – and the ones about not checking your email. It’s obvious to me that these are never written with admins in mind.
As a front office admin my whole day involves multi-tasking and interruptions. Answer phones, walk-in clients, agent requests (all want immediate results), emails, texts from the boss, solve crisis’, and do your main job, all day long. The best admins are well able to deal with this and still get our main jobs done without too much stress.