Why NPC Walking Speeds Are So Annoying RagnarRox Game Design++

Why do so many 3D games turn the act of walking next to an NPC into an ordeal by offering the player just two options of walking speed - too slow and too fast? Morrowind, Oblivion, Skyrim, World of Warcraft, Guild Wars, Age of Conan, Call of Duty - Advanced Warfare, Half-Life 2, Metro - Last Light, The Witcher 3, GTA V - only a few examples of games that are guilty of that. Let's see why this happens and which games cleverly solve this conundrum - Like Red Dead Redemption or Heavy Rain. If you want to sup