I agree with you in theory, but I think that there are a lot of young pitchers today who don't have the control to throw inside without hitting and injuring a player.
https://www.nytimes.com/2018/08/13/books/review-playing-changes-jazz-new-century-nate-chinen.html
A nothing review (that I wasted time reading) about a nothing book (that I won't waste time reading).