Its just like the people who listen to the bank's claim that their money is safe. BOOM, Kony 2012, Bin Laden and Nikolai Volkov pop up through the floor of the vault in a mole machine. They rich, you poor, shoulda kept your money in the sock drawer.
In reality though, the majority of the population hasn't come to grips with the fact that if you have something valuable online, someone will find a way to take it from you. Apple, Google, Microsoft, cell carriers, etc etc all want you to stream and use the cloud. When a company offers a service like this the understanding would hopefully be that the files would be secure. If these companies were honest they would add a sort of language to the user agreement that would admit that there is no way to promise anything at all as far as safety goes. That would make the service worthless though, so they just don't bring it up. If anything these celebrity types are just guilty of not having a clear understanding on how their celebrity status makes them a target online and what people are actually capable of when it comes to stealing data.
Its a shame that it takes these kinds of things to wake people up, but computer security is a pretty boring topic. You find out by knowing people who know and bring it up as a conversation topic. Even then, it seems alien to anyone who doesn't undertand or care to learn. "By the way Jennifer, as im painting you blue here for the next 3 hours, can i make a suggestion? Don't put naked selfies on your online storage." A shame, but pretty understandable.