No hyperbole from me, but certainly there can be differences by sport and by school. You can see the average hours that athletes reported above, from the latest NCAA Goals study.
For any of the sports it’s pretty easy to do the math. Baseball time commitment is high because the number of games played per year are high and games are long. They often play double headers to cut down on travel time…even sometimes during weekdays (so noon start time/lots of missed classes). Obviously no one is holding schools to the NCAA stated daily and weekly time limits.
Lastly, there are plenty of people who can’t read/study on busses…e.g., motion sickness and/or rowdy-not-conducive-to-studying atmosphere.