Games however..the experience changes every time.
In GTA, you're not always shooting gangsters in the first minutes, sometimes, you're shopping for clothes.
You're not always initiating a mission cutscene with questionable language, sometimes, you're just at the Bowling Alley.
I think gaming is much harder to supervise..the content changes, the length of many games go far, far longer than a movie, for example, and it's hard for a parent on the go to get the time to go through all that, or be there all the time...and yeah, the ESRB rating can be a good tool to help those people.
But for those of us that do have a more specific knowledge of the game can approach the problem from a different point of view.
It's just a matter of acknowleging that gaming is a totally different beast, and can be tackled in multiple ways to achieve a result.
That's all I'm trying to say.