Thanks for explaining that in such detail... I'm not an electrical engineer or anything. Yes, neutrals carry electricity, I'm quite aware of that fact.
Also your description of the "unused" electricity flowing through the neutral is at best misleading and at worst straight up wrong, it's the return line that completes the circuit. Unless there is a ground fault the current in the hot and neutral wires is exactly the same magnitude. Look up Kirchhoff's Current Law for details.
Technically you are also wrong about energy flowing to the load via the hot line, seeing as this is alternating current, current flows in both directions in both wires, on alternating halves of the cycle. That doesn't matter in this case, it's what ground reference is that matters.
