Have you ever had days where you stare at the mirror and reckon that you look like a bloodhound with conjunctivitis? Apart from too much dreadful alcohol, that look can also be a result of too much screen time. When spending the majority of your working life looking at information: the positioning, font, and angle and depth of the screen can all be detrimental factors for productivity and health, if your information is not exactly presented as you need it.
Dedicated screen viewers need a monitor arm to get precise information. Maximum ergonomic comfort and maximum productivity. You can be sloppy; but sloppiness has its negative effects. Sloppy monitor arm mounting will fill you with negativity. Stay happy, productive and uplifted, and use a good monitor arm.