Why do we care so much that Pluto isn't a planet?

Twenty years after Pluto lost its planetary status, people are still arguing about it.This spring, NASA Administrator Jared Isaacman publicly threw his support behind "make Pluto a planet again," reigniting the familiar debate. Social media threads are filled with people arguing over whether Pluto should be grandfathered into the planetary club, whether dwarf planets are simply another kind of planet, and whether the distinction matters at all.The disagreement dates to August 24, 2006, when memb