Yes Dave you are correct it's common knowledge the heavier the handle the lighter the bat picks up.
My post was learning more towards retaining a bigger profile within the blade along with bigger edges by reducing the weight of the handle.
I also believe that is the reason why Gray Nicolls developed the Carbon Handle.
I believe like Laver with there Carbo Core it was more due to stiffness really as a avid old time user of a Carbo core and the C6 extensively i can confirm this.
However a broken or near broken handle goes well and i know of a few Asian players who remove bits of rubber and allsorts from there handles.
Why quite a few pro use use heavier than people think due to the handles weight

I also don't think outside the industry it is not a well know fact most on the forum did not know