This argument gets old.
A strong professional bodybuilder who is reasonably tall could train for WSM competition and probably make a good showing for himself. It is all about overall bodily strength and then the neuromuscular coordination to channel that strength into the specific events (event training). You need some conditioning as well to be the best.
Eddie Ellwood made for a respectable strongman competitor. There are other bodybuilders who have done well. Can anyone name them?