This assumes that self-expression does not involve an attempt to fake reality, though it may make reality. A detachment from values can mean a detachment from life. Other people seem to be less like subjects and more like objects to the extent to which they seem unresponsive and uncommunicative of real thought or feeling. The ultimate in objectivity may be to treat oneself as a subject and all others as objects. In this case, one becomes unresponsive and uncommunicative to oneself as well as to the others.
All actions are a response to subjective and objective inputs.
To dash from an onrushing truck is as much a response to a truck as it is an expression of a will to live. Most actions involve far more individually unique intermeshings of subjective and objective components than this example. Such people seem to be objects with no self at all, or very little. Individuals who frequently identify themselves with the objectivity of engineering science and discount artistic or social values may frequently also reject lucrative advantages in sales or managerial work. But below the level of the subject-object dichotomy there must exist some course of action which most promotes the life of the individual in the world.