While intps tend like to think of the implications and possibilities, intjs only care for what produces an answer. My problem with intjs are that if they can't come up with a clear logical answer they make one up, then if the intp tries to tell them they are wrong they demand a better answer and how you came to that conclusion. intps are great at seeing the big picture, but we are indecisive at coming up with answers because we know that there is more to know, after all intp wisdom is knowing that you don't know it all, and this seems to totally elude some intjs. paired with the fact that intps are generally cursed with low self esteem and don't want to expend precious energy arguing with the brick wall intj. Intjs generally think of themselves as awesome and do everything they can to protect that front, can become nearly hostile towards any who try to tell them otherwise by throwing up a huge wall of cognitive dissonance to protect their fragile core while shoving your every mistake and flaw in your face. This is dangerous for intps.
That being said, not all intjs are like that, this is only my experience with a limited number of intjs, and those interactions are generally results of me not wanting to be a dumb follower and to think for myself.