The idea of duality is having people who are theoretically the best matches to let yourself be yourself without psychological discomfort and I believe that, obviously, just as I believe there's a reason why people have different thinking styles and some styles are more compatible than others...that's just common sense and socionics tries to explore that and proposes a theory. However, being a good person or a better person is a conscious choice, I think. If someone doesn't try at all, another person, duality or not, won't be able to do much good on that.
Concentrating on experiencing duality or whatever isn't really helpful. Things will happen if you listen to your gut and if you try to live in a way that you feel proud of and happy with. But I guess that's common sense, too. Of course, I see socionics as an explanation I personally believe in based on experience more than I see it as a guide for life. Same goes with other things that have added to my broader understanding (i.e. gender theory, spiritual philosophy, and whatever ideology that has made an impact).
It seems true and I try to make the best of that understanding where relevant and not let the idea of an ideal relation be a reason to miss out on other great relationships that may not be the socionic ideal. But I guess I'm just pointing out the obvious like I tend to do.
But I believe if people live their lives and try to go after what is right for them, personal success, and all that, it'll happen...whatever good thing that is. No need to read a lot of articles to necessarily do that.
In less words, you can't engage another person if they're not willing or if the circumstances don't really allow for it. But as in a lot of things, to validate yourself and accept yourself as you are and become stronger and better, whatever, is the first step to finding stability, happiness, contentment, a happy relationship, and so on.