So little is really understood about fitness, health and conditioning, that I don't think there's a whole lot to take from this. For years, the Sox were an extreme outlier in staying healthy and in the last few years have reverted to the mean.
A good example of how little is understood about strength and conditioning is the philosophy of the US and Russian weightlifting programs. The Eastern Bloc programs were all about lots of heavy lifting, heavy reps, no diversity in exercises and little recovery time. The US programs were heavy weights, low reps, tons of diversity and tons of recovery. They were polar opposite programs and had very similar results over time. Neither philosophy was right.