Jobs with regular, stable work hours are not simply there by corporate decree. People actually like having that predictability in their lives. It makes it a lot easier to budget your time when you have that block of time carved out where you're making money.
Now, this guy would say hey, you could work half the time if you quit your job and started your own business. Well, that doesn't match up with the experience of any of the business owners I know (they regularly work 12-16 hour days), but even it was true...now I have to run and operate my own business. I can't just show up and do good work and take home a paycheck. I have to deal with insurance, I have to deal with payroll, or I have to pay someone to deal with all of that. If the only benefit I get from that is saying, "but at least I don't have a boss," it's not even close to worth it.