Aren't most dragons/reptile like things like that?
Yeah, but most of them don't rely primarily on sight for locomotion, and as a four legged/no-legged chassis, are quite stable.
A large, bipedal organism is best served with a high angle of stereoscopic vision, especially if it is visually oriented (like humans). Predatory mammals, especially larger ones, often have a high angle field of stereoscopic vision....
Like I said, though, I'm mostly just nitpicking.