Youve not read the topic title have you? This is to do with screenshots. So what if theyre age restricted so are a lot of apps.
The screenshots, (read FRONT COVERS), are being censored. They poster you replied to was right. They can do the same for movies, (if they didnt stand to lose money of course).
Front cover of the new Equalizer movie, on the iTunes Store;
Right, because chances of 10 year old's browsing iTunes to spend £16 on a movie is just as equal as chances of them browsing AppStore for free games....