I'll add on, when a large percentage (not sure of number exactly) of any individual group seems to be having the same issue, it is something that is a worry. TJ or surgery in general on pitchers / players has increased significantly over the years.
Some years ago it became law to wear a seat belt in a car. Why? Because the cars became faster and therefore more accidents (though very small % compared to amount people drive daily) and more injuries and of greater significance. A very small percentage of those driving daily really need it, but because of great data of the prevention of injury and death for those that were involved in an accident, it is now law. That is a great thing.
Although in a MUCH smaller and less catastrophic case, There are certainly more injuries and more significant ones to pitchers specifically and ball players in general over time. The increase research thru data, hopefully, over time the injuries to pitchers / players