Opossums are fucking shit. Have you ever seen a live opossum? No, you've only seen them dead on the side of the road. Opossums don't exist in the wild, they only spawn into existence several seconds before getting hit by a car. They serve no purpose other than to get hit by cars.
Opossums also look like shit. Studies have shown that opossum's inflated rat-looking marsupial asses make them the ugliest animals in the world.
Have you ever hit an opossum while driving? Congratulations, you've helped fulfill the sole purpose in it's life.