For the general public, the trouble with psychology is that it appropriates common concepts and redefines them in accordance with what it can measure. The result is that the public is taken for a dangerous ride.
Thus, when University of Toronto psychology professor, Jordan Peterson, tells his students that if they "don't buy IQ research" they might as well throw out the rest of psychology because IQ research is the best thing psychology has to offer, he is (a) bullying his students, warning them, in effect, that there is no place for them in psychology unless they buckle under and accept the psychologist's definition of intelligence, and (b) redefining intelligence as what psychological research says it is.