Did you even read your own article?
“The big risk factor is year-round baseball,”
The harder you throw, the more torque you put on your elbow, the more likely you are to break down and get injured — and it’s happening at historic rates and happening to some of the best power pitchers in the game.”
So hence if that guy isn't a power pitcher and hangs in the mid to low 80's his arm probably can withstand 130 pitches in a given night. Now if you do that repeatedly, it's probably not a good practice, but not sure why you're condemning the coach without knowing all of the specifics.