That's for when you are working on an hourly basis. I don't know what's wrong with that. That's only to safeguard clients from get billing for hours the freelancer didn't work.
You can work for a fixed price and you won't be tracked.
People do use dynamic programming. But, yeah debugging skills should be given more coverage. A lot of people I've seen programming struggle or don't know how to debug code.
You can work for a fixed price and you won't be tracked.