Why are the charge carriers in a current rather electrons than protons?

Proprons carry a positive charge and are located in the heart of the atom called Nucleous where they can not easily be disloged without destroying the atom or element if you wish. And since we are talking about current then th best examples would be a copper cable to your light builb or a Gold strip on your tv PCB.

Electrons are located on the outer sphere of the nucleus and the outer most layer's electrons in good electric conducting elements are not firmly bonded making it easy for them to move or jump from one atom to another hence allowing an electric current to flow.