This obsession with R-rated animation is completely missing the point of what adult means.
>>101958594Live action is expensive and requires cooperation and many people. Those people have to be coordinated in real time, often on-location somewhere. Animators get to sit in a studio.
In live action film the director is in charge and tells everyone what to do, and they can have a very specific vision and pursue it aggressively. This is also true for animation in Japan. In American animation though, the culture is collaborative to the point that you would almost never know who directed a movie without looking it up. So it's a cultural difference, not something inherent to the mediums.