They cite, in particular, the discipline. Also, in most occupations that I know of, people are entitled to a break twice a day. I never had to stand on my feet. I was given plenty of opportunities to move from the office to the bathroom or the copier or anywhere else if I wanted to. Or go to the copier or somewhere else.
People just take for granted that they have a duty-free lunch.
I am sure that your situation was similar. Also, many people do not bring their work home with them as we do. They make more money than we do. My brother is an insurance agent. When he leaves, it's to spend quality time with his family.