i cant read a thread about such a stupid notion because it will drive me insane to see how much people agree with it.
the thing is, that most people have an unreflected way of using words like real and unreal. this is true in pretty much any context.
people try to reduce their thinking, or their image of reality, to as little perspectives as possible.
if you can fix that, your line of reasoning won't be too silly, i guess.
anyone has an upper limit of perspectives (which can increase with age), you should just try to reach that limit, always, instead of lazily reducing 99% of reality into unreal things, until only "the real thing" is left, which will completely freeze both intellectual and personal growth.
now, in the context of type i can easily see a smart definition of true or real, because type is about a path of development, and your original/fall-back cognitive-circuits, while as real as any other circuit, will always be the first you ever had (established), and so they define the first coordinate of your development, which defines your path, which is your type. (even though, by now the transforming character of integration may have changed which circuit is most "established" in your system, right now)
in most other psychological cases it's more like this: the most valuable thing in your system is the meta-intelligence of your choices about which circuit you use. to always use the original circuit, because you deem it to be more "real" would be the most retarded reasoning of self-management. it's the psychopathic move, that says: humans are basically animals, empathy or social behavior is just fake, and fake is "false" and "should be avoided". the best circuit to use is the one that is best suited for the job, which ever job that is. all circuits are real, even if they are just "compensatory". compensated social behavior is better than none and it is perfectly real.
regression is real, when it happens, while it happens (due to an external trigger, a certain aspect of the "job" you try to accomplish). it does not determine your "real" potential. it may be reflect the best potential in this specific situation. but generally speaking, please try to avoid regression. "growing up" (mental development) does not stop at 21, it never stops (ideally), and it certainly is not meant to go back to your traumatic childhood either.