Is it because the Te caveman approach would be invalidating (
please fill in the more precise word 
) to a Ti user? I would hear the Te user and go "meh, bob is being a jackass again." It might even be a bit funny. When I hear the Fe user, it is much closer to heart-as though they wiped out the value I expressed as being worthless, and substituted thier own as having more value-thus invalidating the in.
A specific example (a long one, my apologies)-my little one recently started Kindergarten. as a baby INTJ, he was very overwhelmed and would just stand and cry-his little Fi was so overwhelmed and he couldnt figure out a Te action plan-he didnt know what to DO yet-he needed to watch the system a bit and get a hang of the routine.
My thought was that I could sit with him before school while he ate breakfast in the cafeteria, treat him with insulin and then walk him to class, so he could get the hang of things. His school was very Fe heavy, extremely so. It rubbed me a bit funny, but I know this is just me and I wanted him to gain perspective of different types of people, so I tried to ignore it. The first day of school I asked the cafeteria teachers if I could sit and it with him. They said "Well...., no...we really dont have enough chairs for that..." with extremely heavy Fe overtones and a huge wierd smile. I looked over and saw about ten cafeteria tables open.
This wasnt meant to be a put-down, more an attempt to control, but it still felt hurtful. The reason it was hurtful was that, without realizing it, she had dismissed my concerns for my son as being invalid.
Step 1-I love my son> Step 2-he was hurting> Step 3-I needed to give him comfort> Step 4-I tried to provide him supportive structure by eating breakfast with him, in a way that doesnt interfere with his school day > Result: My action was rebuffed, based upon her value judgement, thus inadvertantly, she rendered the expression of love for my son as being invalid. By blocking my action, it reveberated back upon the chain of value based linkages (steps) all the way to step 1.
This backwards reverberation is internally troubling, as if I accept her "replacement" judgement as being correct-it places one of my core values for my son in question....maybe that isnt the right value to hold? This is of course, ridiculous, so in the moment, I make my way back down the value chain-through each step-revalidating that the values are reasonable....
then I become angry that she would be so self-centric to try make her own selfish values take precendent over what is best for my child. and become defensive.
The underlined ^^ part is the projection error on my part-it assumes she is an Fi user. Knowing what I know, I dimissed the anger, tried to evaluate the decision as a desire to provide continuity for all the children and just let it go.
We spent three days at this very heavy Fe school, seeing many examples of this same type of behavior. I tried to go with the flow, but ISTP daddy finally snapped and dropped the F-bomb on one of the cross walk ladies. He described them as being (my apologies and no offense intended) "Fucking retarded Nazis" as they just kept trying to enforce rules that were illogical to him, so he requested we move the little guy to a local charter school.
What struck me as very weird was how invalidating the Fe heavy school felt-like the individuality of the children was totally discarded. Instead of "you are a special beautiful little star and filled with potential to do anything you put your mind to, but you do need to follow the rules" (Fi validation, Te affirmation, Te rule setting), the message was "You are no more special than anyone else and dont get special treatment, but we are all in this togehter, let's all be friends together and respect each other and be civil to others by behaving in the same way" (Ti devalidation???/Fe affirmation/Fe behavioral setting)
(He ended up in the local charter school which is pretty Fi heavy. The front lobby is painted silver, kelly green, orange sherbet, off yellow, burgundy, and pink in long vertical stripes a foot wide. It is crazy and I cant pick up Fe from anyone.)