Here’s what I usually say about boredom: In an entertainment culture, people come to expect and desire a high level of arousal. When this level of stimulation is unavailable—perhaps when a person is at work or school—they feel bored.
Through play we can engage in battle with others without real-world consequences. Or we can experience strong feelings without putting ourselves in dangerous situations. Play happens in an imaginary world, a world that doesn't count. That's true, but it's also false.
I recently watched a documentary about Harry Potter fans called "We Are Wizards." I'm afraid I can't recommend the film, it's pretty incoherent. But it was also fascinating in a disturbing sort of way, because it depicted a type of behavior I've never really noticed before: fans of fans.