I do agree that boredom can be seen as a lack of purpose. When you're fullfilling a role or you're passionately sunk into an activity, or train of thought, not much can take you away from it; and most people would describe you as being in the zone, or in the clouds.

With a growing family, I find it's about getting some 'me' time. I've found it tricky to even just shut the door.