Challenging structure fascism!

Just to show (not least to myself) that I understand all those who can live without all the structure that I normally advocate, I will write some posts on a number of questions that I'm curious to get some responds on. Here comes No. 1

Top management has long recognized that strategic planning - especially over longer periods - no longer fits our great volatility. Flexibility and the ability to detect and respond to impulses in the world is probably just as important. You could say that rather than planning, it is important to be prepared when opportunities arise.

Here comes the question: When top management has realized that planning does not help so much, why is it that we in the project management just making a big deal out of that plan? We are equally affected by volatility! If we continue down on the personal level is the same: why do we continue to dream that the daily scheduling helps us very much?