The brand of Ts that are invested in ego, drama, being rude, social dominance do not seem that clear thinking to me. There is a kind of fragmented objectivism that can be cohesive and enlightening in certain contexts, but then evaporates once ego is struck.
Thinkers who are divorced from their own feeling will see it in such a negative light that to them, all that they are is their intellect, skill, talent and ability. This is their sole reason for being here and to live their lives. When they may feel they are not as intelligent or able as they feel they must be to be a worthy person, they have nothing else. They stand there stripped to the bone, cut off from their only sense of self or worth as human being. So they must keep ego defenses up and believe deeply in the infalibility of their thinking and logic, as they have nothing else to believe in themselves about. Really it seems like a lot of inhuman pressure to live under and it would never relent as it comes from the self.
The Feeler divorced from thinking is in just as bad a situation.