Sensativity on Spod price vs Peers, page-12

Why is size shown twice (along the horizontal axis and in the relative sphere sizes)? Obviously all the spheres are directly bigger as you go further to the right - that's the axis, duh! It is just designed to (doubly) exaggerate the size of the projects ... to benefit who...? Oh, yeah that's right... (facepalm emoji). After all, who cares if you will never be able to mine it all (what is the future value of $1 in 60 years time???)? Or get it to market? As long as it is BIGGG!!