What is boredom?
I think boredom is a function of not being comfortable with oneself. Unless there is enough outside stimulation, one is left alone in one's head, and if one does not like themselves they will experience that as boredom.
People with a healthy self-regard are rarely, if ever, bored. They do not need distractions to divert their attention from self-talk.
Great little diagnostic tool to detect how a person regards themselves. The greater propensity for boredom, the harsher their internal environment is.