Measurements are helpful in finding abnormalities such as sharp peaks and dips, or the general tilt. But transferring from the measurement directly to a correction preset ignores the fact that some abnormalities could actually sound good. Therefore, it is better to take guidance from the measurements, but decide on your own what is the ideal response you are looking for.
Of course, I'm not talking about pure accuracy and flatness. I don't think that is achievable of even desirable, because what is accurate is heavily dependent on what music you are listening to and also on the accuracy of your own hearing.