That's significantly less than the average high school student probably hears in a day.
On the other hand, I find movies with constant foul language tedious to watch. I'm happy that movie producers have a financial incentive to really think about whether language really adds to the story or is being thrown in because it is easier to have an actor say f*ck than to have her actually, you know, act out her character's emotions.
Yes, the MPAA is prudish and has gotten more prudish over the years (there is no way the original Exorcist would be rated R today). I also think ratings could be made more objective (but some subjectiveness will remain). Finally, the MPAA shouldn't be the ones doing the rating, simply because of the conflicts of interest involved.
Either way though, I don't think it should be the ratings agency's job to enforce artistic quality. Either movies that lazily use profanity will fail on their own lack of merit, or they'll succeed; in which case I would argue that the public is getting what it's asking for.
Side note: I think it's poor form to lead a comment with "I know this will get downvoted" or "time to burn some karma" etc. It comes off as a pretty annoying attempt to psychologically manipulate readers.