Yeah, you would say that.No one, except police, legal system, tax authorities and your parents (if one is under-aged), has power over anyone. It's all in people's heads, how much they give up their freedom or willing to accept "power" from another.
But in reality, people do have power over others. It's not always in their heads, and you know that. But even if it is all in one's head, it can be very real.