It make absolutely no sense that Fantastic Four: Rise of the Silver Surfer the movie has a PG rating while the video game has a Teen rating. Is the ESRB over protective or is MPAA corrupt? How come I think it’s both?

It make absolutely no sense that Fantastic Four: Rise of the Silver Surfer the movie has a PG rating while the video game has a Teen rating. Is the ESRB over protective or is MPAA corrupt? How come I think it's both?