I think you can’t overestimate the importance of this and earlier studies by Scott, especially this one, which shows the relative success of major league and Negro league teams against teams of various minor league levels (in addition to semipro clubs). Such games are commonly dismissed as “meaningless” exhibitions, yet when you put together large numbers of them, unmistakable patterns begin to emerge. This argues for the ultimate usefulness of all games in studying Negro league and semipro players and relating them to their counterparts in organized baseball.
We haven’t come close to collecting and processing the full range of available data still hidden in hundreds of pre-war newspapers. But Scott’s work points the way and shows that the labor will definitely one day be worth it.