not being absolutely perfect suggests a lack of understanding, but at that point we're engaged in a tautology.
Values are those things that help guide you in the face of imperfect information. Not having a crystal ball that can predict the future perfectly means you have imperfect information.
Perfection is not necessary for you to be confident that you have a reasonable understanding and can build something to match. It is possible the confidence will prove to be misguided, but you can deal with that later.
To prioritize flexibility means that one lacks the understanding required to even build a misguided confidence.
That does not imply there is a lack of understanding in the moment. Understanding does not seek perfection towards future events. However, if you do not even understand what is known in the present, that is when you will start to lean on flexibility.
Values are those things that help guide you in the face of imperfect information. Not having a crystal ball that can predict the future perfectly means you have imperfect information.