I think it totally depends on the job. It's like a process running on a CPU. I've seen software development roles that are "batch processes," where the developer goes into a cave to crank through his tasks uninterrupted, and then emerges in a week to deliver the results. And others that are "interactive, event-driven processes," where there is a lot of back and forth between product owners, UX, and other stakeholders, and lots of iteration and refinement. And then there is a whole spectrum in between! One size doesn't necessarily fit all development styles.