I don't think he's ahead of Justin Thomas. I appreciate consistency, and I don't revere the majors as much as others, but three wins beats one win.
He does have the 6th-best odds in Vegas right now...so maybe they heard it first?
DJ and JT are the only players who have won twice this year (although if you go back in the fall last year, then Hedeki has, too). Sergio, I suppose, but he hasn't had a T10 outside of the Maters. I also put a lot of stock in the WCG events, because of the field in those. Rahm is 4th in the FedEx Cup, behind Hedeki and JT, who I don't think have been as consistent. 2nd in strokes gained. So yeah.
Rahm's amateur career is also great. He's not a flash in the pan.
I think you're on the right track, Joe. Straight is great! Crooked is, uh, well, I can't think of anything clever that rhymes with crooked other than crooked! So, crooked is crooked! And you don't want to be that way!