Since everything is made of quarks and electrons, why use the word "life"? Everything is just physics including "life" so why not present it that way? It's all interacting particles, some interactions are just more complex than others. Why categorize things as living or non-living? What does it add to the discussion? What difference does it make if a virus is "alive" or not? It's neither, it just is. It does what it does regardless of what you call it.