> Why do we need predictable deliveries? Because if Bobby from accounting doesn't have your piece of software ready by the 31st of November the company will be slapped by a fine from the IRS so large that you'll need to update your CV alongside all your colleagues from the now bankrupt company you used to work for.

Yep, at the end of the day, the whole world can't run if everyone is a professor emeritus just freely exploring random possibilities, even if it would be hundred times more efficient to just "get out of the way".