It's really saddening that people bought into the false dichotomy of work VS leisure.
Lifelong endeavors in science, art, activism, politics exist[ed] outside of what we call "work".
Einstein, Maxwell, Darwin and countless others are/were doing something that is not "work" and certainly not a "hobby". Call it a purpose or a mission.
Serious volunteering and activism doesn't require you to be a genius tho. There is plenty of needs that are not addressed in this world.