Why use the word “control” when it has negative connotations?
Because there is no other word that describes the particular phenomenon explained by PCT — the phenomenon of purposeful behavior or control — as well. But the word control does not always have negative connotations. Control is often a very good thing. Being in control of your own life is good; being out of control is a sign of mental illness. Athletes like to have control of their bodies. Teachers like to have control of their classes. Control is only considered bad when other people try to control you. PCT explains why attempts to control other people lead to problems.