Well, yes but also no. XD
In my experience, dichotomies are extremes used to define reality. They're fundamentally unrealistic because nothing ever leans completely one direction or another. BUT they are useful for mapping out a position. Duality is a natural phenomenon. Black and white, up and down, hot or cold, tranquil or agitated, etc. What really bothers me about dichotomies is that people will label each other as leaning completely in one direction or the other on any gradient scale, and that simply isn't how human psychology operates. But it just boils down to in-group/out-group bias and people trying to prevent the out-group from becoming an in-group as an evolutionary reflex to rebuke the corruption of their in-group's accepted values. So, I don't like it but I understand it.