They cannot accurately predict future successful performance except at certain jobs in specific environments. In fact, you are the best judge of your skills if you take an accurate reading of your own experiences. Values are vague, global concepts, sometimes difficult to understand. A value is something that is important to you or that you feel has worth such as marriage, family, religion, education, etc. What has little value for one person may be of great value to another.
Values tend to permeate and influence all aspects of our lives.
Just as life is ever changing, so are values. Values evolve and continue to develop just as the individual grows and develops. Work-related values encompass a wide variety of specific elements. Interests and abilities are not the same thing. You may have interests in a field or interests in common with specific professionals, but you may lack the abilities necessary to be successful in this field.