For something to be "more useful" you need to have tried both alternatives. What formal training have you gone through?i reject the idea that formalized training as a listener is preferred. i believe that experience and repetition in focused music listening are more useful methods at becoming a good listener. which then becomes a great assistance at system building and gear choosing.
If you have not gone through any, then I remain alone in having tried both alternatives and I can tell you that it is trivial -- trivial -- to beat any audiophiles with training. We did large scale listening tests at Microsoft using our audiophile population and they would lose completely to our non-audiophile but trained listeners. It was not even close.
It is like you telling me by driving a lot of cars you become as good as a trained mechanic in diagnostic of car problems. It just doesn't happen or your salespeople would be working in your repair shop at work.