Question

why are voluntary actions necessary

Answer 1

voluntary when one intends to do the action is not scientific and introduces the fallacy of the homunculus — that there is a “little man” within the brain, willfully choosing one action plan over another.  (The fallacy is that, when introducing the homunculus, one then must also explain how itsbehaviors and decisions arise.  Do they, too, arise from yet another little man inside a mind, this time, inside the tiny mind of the homunculus?)



Scientific approaches to voluntary behavior have stemmed from research on consciousness and action control.  Investigations on action control have begun to reveal what conscious states contribute to our behavior. When actions occur unconsciously (e.g., as in neurological disorders or reflexes), they seem to lack “integration,” as if the actions are not influenced by all the kinds of information by which they should be influenced. The actions therefore appear impulsive and irrational. In contrast, when actions are mediated by conscious processes, they are “integrated” actions, which are influenced by many sources of information.  

Integrated behavior occurs, for example, when one is underwater and has the urge to inhale but suppresses this response, or when one is carrying a hot dish of food and experiences the urge to drop the dish and to refrain from dropping it.  During the holidays, integrated behaviors arise when one desires eating a tasty dessert (e.g., cherry pie) but refrains from doing so because of health concerns.

Answer 2

Our mind does this 'involuntary action'. Voluntary Actions: Eating, bathing, walking, running, and doing all that day to day activities that involves your muscles with brain are all Volunatry actions. They are not told/programmed to us by anybody.