[Crazy Jetty]

Except they don't do realism, in the movies. They either go for just under, or they jump passed to hyper-gore, or borderline hyper-gore.
I still don't see how mor equals better. If the script is good, the actors are good, and the effects are good, it's still going to be a great movie if it lacks the uber gore.
Likewise, if the script is bad, and the actors are bad, the additional gore is not going to make if a good movie.
Rating has nothing to do with it.
AVP:R was ten times more violent than AVP, and it was also ten times worse. Worse actors, worse script, worse directing, worse concepts.
A bad movie is going to be a bad movie, no matter what it's rating or content. And a good movie is going to be a good movie no matter what it's rated.