If, as you say, “The framework of rational choice theory assumes that preferences are complete,” then rational choice theory differs from the intentional stance and from folk psychology since there’s no such utopianism in the latter. And I doubt economists use folk psychological terms in their models of Homo economicus. They don’t speak of beliefs and desires, fears and hopes, prejudices and faith. They don’t make such subjective judgments. Instead, they speak of what’s mathematically tractable, namely computations or calculations, as though the economic actor were a robot. That’s the implicit psychopathy (the lack of instinct, intuition, emotion, irrationality, and specifically empathy as such in the model of buyers and sellers).