I think what this article is referring to is the importance of retaining perspective of the goals of the project. An experienced programmer might have the ability to program to a very high standard but he should reserve that for times when it is justified—not forgetting that practice or curiosity alone is occasionally adequate justification.

You can go further with this thinking and suggest maybe it isn’t even useful to ask “is this good enough?” and instead ask “is this sensible given xyz?” or ”will this be worth doing?” and forget about what is means to be good enough or assess the quality of your work in absolute terms.