Yeah, totally respect your opinion, but I emphatically disagree with it. The goal of what’s being discussed here isn’t to maximize production for the sake of shareholders, it’s to maximize quality of life for employees. To that end, five six-hour days are worse than four 8-to-10-hour days.
If I start work at 8 and get off work at 2:30 or 3, I still can’t start my camping trip a day early, or spend the day at the water park with my kids. I still have to give up n x 10 hours of my life, where n is my commute time, assume I work in-office.
I would much rather work until 630 Monday through Thursday, and have an extra day where full-day activities are possible every week. That’s worth more to me than 10 extra hours per week of after-work time.