The 'matrix' effect is more akin to S oriented thinking rather than N. An unimaginative person is more likely to be 'brainwashed' by conventional ways of thinking. The idea of the matrix is that most people do not see the world as it really is, but as a way those who wish to control them want them to see it. People who do not think critically believe what they are told (lacking imagination is one reason many people do not think critically).
It is indeed the case if Intuition is undisciplined(Thinking, not sensation is necessary in order to provide the proper structure in order to discipline the intuition for reasons mentioned earlier) it will lead to an illusory view of the world. However, this exercise of Intuition is still to be preferred to the way the Sensor uses it because whilst in the former case one may make numerous mistakes, yet the Sensor uses the Intuition almost not at all and therefore by default makes more mistakes.
This is much like if two students took a multiple choice test, one of them read every question but did not know the answer to any of them, yet took an educated guess with regard to all of them. The other student did not read any of the questions nor attempted to answer. The former is more likely to receive the higher of the two scores.