Sonionics only works if the functions were completely isolated and you could only use the first two. But, we are not that limited.
As I have said before, the Ego and ID require each other to live and breath. They are mearly the same thing with different energy levels. They are
connected, which you cannot deny. You cannot use
to organize logical structures unless there is some measurable
influence, for example.
is a reflective process, and
an energy enpending process, naturally. So, if you use one, the other one is used at least occasionally. The opression of say,
, would be like the example I put above of
. The
type would become completely oblivious to "objective" influence, and turn away from the facts to the point of insanity (at least this is what Jung believed). But a healthy
type would use plenty of
as well, otherwise it's worthless.
This is why Jung described unhealthy people in Psychological Types. They were the most extreme, "pure" types. They were the people who were denied the use of their opposite energy level. He described the same thing about Introverted Sensing (again) that I have, and it's what happens when they are denied the use of Extraverted Sensing (read it if you are unfamiliar with it).
I see the same thing with relationships. Some of them work, but only if I subject myself to being one-sided (1 & 2 functions). This is counter-productive, because it only exposes the holes in all of the "unfavorable" relationships (such as illusion), without fixing the problems (which is possible).