The world's governments understood a while back that the media is a powerful endocrination tool. If you show lots of violence people become less prone to violence, less prone to fight, more stable and easily controlable, like livestock. Because they have an escape from violence without having to get into confrontations directly.
By saying sex is bad and demonizing pornography and such, they make it more appealing because it's a no no place. Leading to people's current view on sexuality and long term relationships. Ever wondered why people are more addicted to sex than before? Why relationships don't last? Why women are increasingly objectified and subconsciously want to be objects and can't process love as well as they used to? All that and more leads to men losing interest in a number of things. Society becomes more feminine, much less masculine, no balance. The end result is the world you live in today. Where right is wrong. Where we accept war in other contries complacently, where men act more like women, more passive-aggressivly. Where no one stands up for anything and most people think that waving signs in the air or liking a page on facebook makes a difference.
Eventually producers, developers, directors, whatever, end up doing it because they already think that way so it becomes automatic.
Sounds strange and farfeched doesn't it? Well, it's human nature to copy what you see when you're a baby, so why should that die down when you grow older? It doesn't in most cases. If you were in "power", wouldn't you want to be more in control? Wouldn't you want to subdue people just a tiny little more so they'd be less hectic? So if the option to demonize something through the media presented itself, wouldn't you go for it? So easy, untraceable back to you. Tempting isn't it?
There you go brother. The media is a very easy to use tool for manipulation and a very scary one because it works so well and almost no one notices. Those who do notice aren't many and don't know each other most of the times. And it has been builp up for quit a few decades now. That way of being.