According to socionics theory we are supposed to be very sensitive when we get hit in the realm of the polr. For example when people point out at our shortcomings.
According to classical jungian theory this is something that would happen when the inferior function is hit. Jung's close colleague, Von Franz, came as far as giving an example of a Ni lead which was not able to turn on the car, stubbornly continue on it's own trying to solve the problem, while the other person in the car stayed silent despite knowing what the very sensorially obvious solution was. So why didn't she talk and solve the problem? Because she knew how oversensitive the Ni lead was in such matters.
In one case it's about the polr, while in the other case it's about the inferior function. In any case it's about a 1D (and thus weak) IE. Now that there's some more context let's go to the real question:
What about being hit in the realm of a strong function? Let me take as an example a depressed SLE stuck in an unfavorable environment. Should we for example believe that a obvious SLE considered weak and not pragmatic by the people surrounding him because of a couple of past incidents in the realm of Se should consider his Se to be in a sensitive position? I think it's not correct. No person is a God. Everyone can fail, and the perception of other people is always unstable and rarely accurate. I don't think that our SLE would just laugh at the people ridiculing his perceived shortcomings. And I think this would hurt the SLE especially, since it's an important part of his ego to come across in a certain way.
The same could apply to a LIE failing some business enterprise. For sure some people around him could start doubting his Te capabilities. He himself probably will feel some form of pain because of certain comments. This doesn't mean that his Te his weak.
So, I just wanted to raise a point and give some food for thought. There's a dangerous tendency to stereotype the sensitivity of every situation and type with haste according to "weak functions" which sometimes end up being in fact strong.