You're racing in a rocket car...you think they'll be playing the main story for spectacular racing action? And those people don't understand satirical comedy then
Or they just aren't into the crude adult humor. That is a possibility. Also there are several other rating descriptors that just don't appeal to a large group of people. I personally don't care for GTA all that much because of those reasons, except for GTA online and that is only because I can play it with friends.
To a lesser degree you are correct. Like I said, I'm not a big fan of it. I don't really think it is overly necessary for most forms of media. I will admit that certain movies and tv shows and games do require the mature content in order to be able to properly tell their stories, but most things don't. Things like GTA just have it because they can, and it doesn't really add much in my opinion. [spoiler]Keep in mind that these are my opinions, so I hope you can just leave it at that.[/spoiler]