Directors just live in their own confines of their world. So a lot of them don't realize what they are doing in terms of what's going on in the world or film world. Think of this. Bruce Boxleightner (sp: tron, babylon5) had no idea what computers were doing way back when Tron was done. For us kids, it was huge. BUT you still get actors who don't realize what green/blue screen can do or cg.

Actors stay in the confines of their world.

Directors and writers too.

Can anyone see James Cameron doing a movie like Platoon or Full Metal Jacket? No? That's cuz it's foreign to him just as Paul K Anderson wouldn't understand a chick flick.