Yeah but butt in seat time is important! Once had a job where I was working 10am to 4pm with an hour lunch. Was fine for a long time until the company management became more OCD about their bean-counting and I got a new toxic "yes man/ass kisser to management" boss.

Suddenly my work hours were an issue. They started hard enforcing a department-wide policy where if you weren't seen at your desk, you're assumed to be not working. Under the threat of being fired, I was forced to sit at work from 9am to 7pm. I suspect managers also had "monitors" assigned to keep a watch over employees like me and hours we were at our desks.

It was a massive waste of my time as I was now spending a additional 20 hours a week at the office to do the same amount of work as before.