Repeating yourself doesn't make it true. 3-plus is not even abnormal for the regular human population, let alone NBA players. To put it into perspective, Metu tied at the combined for the fourth-shortest arms among centers (and since Porter and Konate went back to school, it was really like second-shortest). And that was with guys like Bamba, Carter and Ayton not attending. He was the fifth-shortest center measured, with only Omari Spellman being drafted among the players shorter measurements. And Spellman, like a normal NBA player, has a six-inch differential between his wingspan and height, and he outweighs Metu by more than 30 points while also being more skilled and having range.
https://stats.nba.com/draft/combine-...F=POSITION*E*c
Those are the actual combine results for centers. Metu is really small. He's not too small to ever make it work, but it's not fine.