Eh, #1, the Sox have to survive this season first with a relative amount of health. If the pitching doesn't stay healthy, this team is toast. So as a part of this we are relying on Carlos Rodon, who has been hurt more often in his career than not. We are relying on Crochet and Kopech who are both looking at innings performances WAY over anything they have in recent years at best, ever at worst. We are relying on Dylan Cease who has a career high of 141 innings. We are relying on Dallas who missed a chunk of 2020, and missed half of 2019, as well as missing big chunks of 2016 and 2017,
#2, Vegas odds are not set to determine favorites, they are determined to maximize profits.
I mean there are reasons to like the Sox chances, but there are LOT of things that can go very wrong, and a good chunk of them aren't that far out of reality.