I don’t understand why this article was written

Mike Isaac and John Paczkowski wrote an article about how Apple forced Vine to have a 17+ rating. The reason for the rating is because it could show the user porn.

In other words, think of yourself as a teenager to Apple’s repressed mother — you hide your porn under your mattress. You don’t leave it out on the coffee table.

I don’t get the reason for the article. Besides taking an unnecessary swipe at Apple — actually several swipes — I don’t understand what their problem is.