Can you explain what you mean by "made every unit ranged"? Does that mean that zerglings, zealots, ultralisks, firebats/hellions, banelings... (did I miss any)

Can you explain what you mean by "made every unit ranged"? Does that mean that zerglings, zealots, ultralisks, firebats/hellions, banelings... (did I miss any) are ranged attack units? Because they swing claws and blades and flamethrowers around?