You can develop yourself/CPs and appear to be a less 'stereotypical' version of an ISTJ, for sure, and evolve into a more balanced person. Who says you can't strengthen Ni or Fi? etc Have you looked into learning CPs?
CPs? I don't know what that is. I'm trying to use context clues here.... Cognition.... Perception....?
From a Keirseyian perspective, SJs aren't necessarily about tradition per se, it's more that they see time-tested methods as, you know, tested and reliable. Hence, they tend to trust them more and are suspicious of abandoning them for newfangledness.
NTs see everything as needing improvement, and have little or no respect for time as a crucible for "proving" an idea/method/whatever. They typically assume that if it's old, people probably haven't been thinking hard enough on how to improve it.
The idea that SJs blindly hold to convention and tradition is a bit of a myth. They'll throw it out if it's obviously inefficient like any reasonable person would. It's more that they have an attitude of trusting what's been established by long efforts and consistant, reliable use than just throwing that all out for something that should be theoretically more efficient. It's subtle, but different than blindly trusting tradition, for sure. Sort of the whole "If it ain't broke, don't fix it" saying. But if it is broke, any intelligent person will fix it. NTs think more that if it ain't broke, it doesn't have enough features yet (think of Windows Vista).
Oh, and CPs mean cognitive processes. Ni, Ti, Se -- all that.
You can't wait for inspiration. You have to go after it with a club. - Jack London
I wonder this too sometimes,especially with many saying most really introverted INTJs are just ISTJs and I'll probably never know since I'm really introverted. I believe in God, but not because I'm supposed to, I came to the conclusion on my own and I'm the only one in my family who does go to church. But I'm not much of a tradition person either, I don't vote and my views are independant, I'm asexual, and even in the church I don't care for the rituals. I am orthodox though, not because that's the way it's always been done, but because that's what my investigation leads me to be. + I score high N on the test.. usually over 50. I should really look up Ni and Si.. Plus the INTJ description fits me better, so I'll stick with it. It works.