I agree, I think there is something to being strong up the middle. What I wonder about is range in this day and age of defensive positioning. Is range as important as it used to be? Certainly having that skill set works well regardless of where the fielder sets up.
I find it odd given advantages these days with respect to training and nutrition and general health and wellbeing that players aren’t able to keep up with the physical demands of the game now vs the past.
I suspect pitchers are putting too much on their arms and throwing maximum pitches rather than pitching a longer game is a strategy and health issue. Throw it on a spectrum between the two, I’m not sure where it resides. I grew up with shorter pitching staffs. I think the 1984 Tigers had all of 13 or 14 different pitchers used that season. There’s now 13 pitchers on the roster at any given time and a few of those are shuffled from majors to minors during the season.
Yes, agree, there’s credit to both, but difficulty to assign some kind of amount or percentage. We don’t know all of the behind the scenes that either one (or other people) have contributed to the overall success.