I agree with most of the comments here but I wanted to point something out. If the author wants to find someone to blame, look at the very liberal NCAA.
As schools are forced to limit men’s scholarships due to title IX the NCAA caps the number of baseball scholarships at 11.7 for DI and 9 for DII teams. DI limits rosters at 35 and only 27 can be on scholarship.
If all scholarships were divided evenly (they aren’t, some positions are more important) then everyone of the 27 would get a 43% scholarship with 8 players getting nothing.
A lower income kid is much less likely to get college paid for in baseball than football or basketball. Add that to the fact that DI talent level players are recruited from top travel teams (which are very expensive), and it is no shock that most American players are going to be white and from middle or upper class families.
The cap on scholarships is due to baseball not being a revenue producing sport. When the typical Div I games admission price is $0, there is not going to be many scholarships given out. Even the big conference schools try to recruit from within state. They can get three in state players for the price of one out of state player.