I tend to agree with the bold comment now versus 5 years ago. BIG loses their top young talent every year to NBA, because they recruit top talent. Teams that have older/seasoned players are doing better in the NCAA and BIG loses. Penn State is a good example of older players (ISU too but they have zero shooters) that can shoot.
IMO the other factor is the BIG is a big man conference and NCAA tourney is about athletes and guards. Iowa has neither, so............
Purdue has been 100% big man based team relying on giants for past 10 years. This year again 1 giant and 4 stiffs surrounding him. That doesn't describe the rest of the league.
While most of the B1G teams that made tourney had bigs with some scoring ability, the overall athleticism of B1G is lower, there are too many slow twitch, below the rim, skinny guys. I would say Sandfort, CMAC, PMAC all fall in some of those categories. Rebraca was decent athlete, nothing special an Kris himself is not super athlete, just more athletic than rest of the squad