I think its less about to be concerned that everything is tidy and orderly or organized thats prolly more important to oneself, if the brain is haphazard without it.
It's about surviving, being the one with the plan, not forgettin the redline in a project, focussing on the outcome, maximizing knowledge out of curiousity and concretly implementing it to actually create something, to become someone, to build something or reach a long-term goal.
I dont think P's lack that in any way, but what they could lack for example is that long-term planning. A friend of mine, who lives 200 miles from here wanted to move to my town to study here but recently spoiled the idea, cause his girlfriend moved back in with him.
I dont say he is dumb or doesent follow a clear plan. But I couldnt change my mind that fast. I always need something distant in the future I can look out to, to reach with my current activities but I couldnt live life on the spur of the moment.
All other so called qualities of Js, like being able to organize something or being a leader or whatsoever are qualities you can bring out in every other person too. If you are a good J.