Anyway...you can argue if you want. I am just gonna have to disagree with the generality as I still do not believe that N/S is the cause of what you see nor does it do any real justice. It just creates just as much an issue as it does solve a problem. Grouping at that high a level is WAY to broad. Its like stealing from peter to pay paul. INFP tries to group me with INTJs all the time...only I dont have that "Negative" side that she sees, just as I dont have that negative side that most who are typed as "ISTP" have. I have a hole other set of "issues" to deal with.
What comes to mind with MBTI is "Inherent flaw in the design of the system" which you have to get around and to do this you must understand "half" types....it would kinda be like "wings" with enneagram.