Somebody already figured out what horror thing could have happened to us in childhood to became this fearful of talking?

Somebody already figured out what horror thing could have happened to us in childhood to became this fearful of talking? This is a genuine question really. I'm thinking about my stuttering and how this have shaped all my life experience? What could have happened to me and all this people with a stutter to be this afraid of talking? Sometimes I don't really get it. This consumes most of our energy, it's like a prison imposed by ourselves but very hard to escape. It's terrifying how subconsciouly ingrained this condition is in most of us. Like how? When all of this happened? Prolly I will never be the real ME ever but just this self conscious bag that try to be human everyday that is waiting for that day when some magic happens and I can be human again.