If he manages to be his own boss (startup, small company, etc) then that is precisely right. However if he has a job(and he states he does) then his value as a

If he manages to be his own boss (startup, small company, etc) then that is precisely right. However if he has a job(and he states he does) then his value as an employee is about him carrying out the projects his boss(es) see value in. Of course, a good boss will try to explain why the tasks he is assigning are important so the employees will see value in it too. Sometimes that is not possible. For instance, perhaps the reason behind the task involves sensitive information that cannot be released (this comes up very often in the military, and occassionally in corporate jobs.) Perhaps there just isn't time for the explanation right then. Or perhaps the employee just disagrees with the explanation when given. In those cases, a good employee will get the project done well whether or not the employee sees value in it because the boss/organization does see value in it. An employee that does not do that should and probably will be fired with cause.