I don't want to register on that site or get into a debate with the people there. We have enough baseball fans here to debate this.
However, Brian, a strict pitch count of 100 might be stupid, but abusing players by not caring about workload is worse. In looking at pitchers from the past, survivorship bias becomes a massive distortion. Sure, Nolan Ryan threw 134 pitches per start. "Pitch counts are stupid because Nolan Ryan" isn't a very good argument. "Pitch counts are needed because Dusty Baker" is also stupid, but a bit more accurate.
Mechanics, innings pitched, workload changes (ie, 60 innings in the minors to 200 in the majors) all play a huge role. Perhaps there's a bit to be gained by not having a strict 100 pitch count, but I think good managers already allow for that, like JV going above 100 if he's pitching well.