animated fims in america

I feel like I'm writing to much in theses blog assignments so I am going to attempt to keep this one as short as possible.
the article is about animated movies and how they have become more of a genera rather than a medium to which the story is told. The article points out that movies do make an effort to branch out and appeal to adults, but they are still primarily directed at one age group, children. This fact alone can could be what makes animation classify as a genera not a medium. What happens to movies that don't take the classical route and try to become an action movie? Well they usually die at the box office, losing out to what ever movie that did take the usual route because that seems to be where the money is made. The last thing the article pointed out was that animation is a lot cheaper than live action and since most movies use animated rendering to create some of their more impressive moments it only makes sense that there should be a more serous movie that is animated.
I can only speculated that after seeing the beginning of halo 4 there one day be a fully animated movie for adults the computer technology is getting there and if some people from the game industry made a fully animated movie I guarantee it would make a lot of money. Lastly I do agree its time to make an animated movie for adults I'm tired of these kid movies, I want a protagonist who can say the F word or bleed or event comment on at a pretty girl, something to make these movies about more about entertaining the masses not the masses children.
my only question is "why not?"