That’s not really the same topic. Employers still have the right to set terms of employment. If they want you to work 9-5 and not 8-4, they have every right to set that expectation. If you’re hourly they can send you home at Noon on Friday and you just won’t be earning 40 hours of pay that week. Salary they really can’t.

That’s not to say that people aren’t miss classified as exempt or that some employers try to use it as an excuse to get over 40 hours of work out of someone. Different topic all together.