Some have suggested creating a contrast with “first-person shooters” by coining the term “first-person walkers,” defining these as games in which “a player’s perception of the game world may be refocused to that of an investigator or close observer, via a strict adherence to minimal interactivity and slow, limited pacing” (Muscat 2016).
Changing the name of "walking simulators" to a "first person walker" game undermines the whole idea of a simulator. Simulators are purposefully meant to simulate an experience/world, and by walking, you truly explore a new world and fully indugle in its concepts. Most simulators also have an end goal in mind (granting the player agency), a drive to fully experience the world.