The subtext of the article seems basically to be that the author does not want to estimate tasks. Which is nice when someone else pays. It is less nice when you have to pay however.
Yeah, the real world needs costs, estimates, timelines.
And you can help make them as good as possible.
Despite what they have told you, that's never a real issue. If the project is divided into small tasks, if progress is not being made on these tasks, the management always has the right to steer the direction of the project or to reassign the staff tasked to it. This is how management can continue to control the expenses. As for estimates, even an AI can give those, probably better than what a human can, and without any stress.