Aren't those, pretty much by definition, the traits of a poor manipulator? A great manipulator wouldn't seem so false.
Let me put it this way: How natural do you think you would seem if you were spending hours of every day in front of dozens of cameras, knowing that the slightest misstatement or weird facial expression is going to spread across social media to the entire country and be analyzed and picked apart and turned into memes and used against you by your opponents? I think anyone who seems like a "normal person" in that situation is anything but.