If he is such a force of nature?

Pr. 40 minutes in college:

Zion: 12.3 rpg

compared to

Blake Griffin: 17.3 rpg
Sir Charles: 13.3 rpg
Kevin Love. 14.4 rpg
Larry Johnson: 13.7 rpg
Draymond Green: 12.8 prg

This guy does not project to be an elite rebounder at all.

I'm guessing he tops out at something like 8.