I don't quite get his logic. Chapman, at age 22, lacks polish and is a bit immature; not yet ready to make use of his 100 mph LH fastball at the major league level as evidence but an up and down season in AAA. Therefore, he'll be lucky to be a journeyman in his major league career. What?
I think it's obvious people raised the bar a little high on Chapman during spring training, but the way he talked like Chapman will never improve is my biggest complaint. Regardless of how many years he spent pitching in Cuba, Chapman still has plenty of time to get better. And didn't Chapman say he fixed a flaw in his delivery after he first saw video of himself pitching on TV in some other country? That doesn't sound like he was receiving top flight coaching. Give him a year working with Soto and Power, and then see where he's at.