From article: "Over time, cybernetics’s contributions were stripped away and reclassified as something else. Early work on feedback loops in cognition became AI. Models of the format of feedback loops became information theory. Work on feedback loops around production became part of economics. Work on mathematical representations of complex systems became system dynamics. Work on feedback loops in behavior moved over to sociology and psychology. Cybernetic theory practically founded anthropology and cognitive science."

Control theory is just one amongst many splinters, without any implied primacy of control theory.