I always try to avoid using things like frequency spectrum analyzers because even random music listeners don't hear music with their eyes but with their ears.
Training your ears is definitely a beneficial thing in the long run but comes with putting in a lot of hours just listening to so much music. Of course, frequency analyzers are useful although they can be a little distracting and make you make mixing decisions that are more pleasing to what you see instead of what may sound best when heard by an average music listener.