If we decide, for whatever reason, to be interested in detail rather than the big picture, for example, or possibilities rather than procedures, and we find that that (unconscious) choice works for us, then we’re likely to do more of it—without really thinking, obviously.
And so there is positive feedback reinforcing the pattern. As we develop and mature into adults, it would seem we gravitate towards one or other end of all these spectra of personality traits.
Moving back to a mid-point will take a conscious effort.
In other words, to be flexible requires a greater degree of mindfulness. We need some regulation to avoid being at the extremes.
Because without that, that’s where we’ll tend to end up.