Yes, but it's a two-part process. Bits are very easy to copy around, and providing an easy way of giving money will only get you so far. What happens when the alternative of pirating is just as easy, but doesn't require money? If you want to make a nicer experience, you will eventually have to make pirating harder.
> DRM doesn't even remotely stop the spread of content.
Of course it does! No, it doesn't stop you. You know what torrents are, you know which torrents are likely to be viruses and which are in formats your computer is capable of reading. Many people out there know none of that, but can easily find the itunes button on their ipads. And all of those people have no way of sharing the things they buy, thanks to DRM.
> Name one real-world DRM system that makes piracy look less attractive for content (movies, music, books).
Here's another: Netflix. All you do is give Netflix a little bit of money each month, and then you don't have to worry about starting the download a couple hours before you want to start watching. You don't have to worry about getting caught under the new six-strikes program. You can't easily copy what Netflix gives you thanks to good old DRM, but that doesn't really hurt you.