I appreciate the irony, and to some degree I agree with the argument but you have to keep in mind that in the real world employers like to see their cogs working.

I'm a night owl and I really hate getting up early. Early in my career when I was working in digital advertising I had a job where I tried to argue with my employer that while I'm coming late to work I never refuse to stay late hours or work through weekends when jobs needs it. Unpaid overtime mind you. They didn't understood. Instead they preferred - at least they thought they preferred - seeing me at my desk from 10 to 6, because that's what they were paying for. After 18 they were leaving the office and not knowing what I was doing they just assumed no work was done. Probably. Actually couple of jobs like that. Those were small shops. Recently I worked for bigger corps and (un)surprisingly the patter repeated. Instead of agreeing on me showing late to the office but willing to stay late if there was actual work to do without getting any compensation my managers preferred me to get to my desk by 9 and sit there till 5 even if there was nothing to be done. Another recent situation was when I was responsible for architecture and setting up a team for a fairly complicated project. I like to think on my feet so I was spending a lot of my time in quiet corridors of the office or in cafeteria trying to figure out how to make things going. My managers were furious at me for not sitting in front of my desk and I repeatedly failed to convinced them that neither my job description, nor my current position requires me to sit in front of my keyboard at all time to complete the tasks I'm facing.

I agree it's stupid, but we can't deny that it's sad reality for many people out there.