Thanks for posting the article. It does make some good points.
My 2020 son gave up soccer this fall (he made varsity last year) to play fall ball. I would have been fine either way, but he decided he wants to focus on baseball and he wasn't happy with the way he played this summer.
I think that multiple sports are best, especially before HS. And because my son Is primarily a pitcher, I absolutely count his innings and his total pitches--if he were near 100 innings, he wouldn't pitch this fall. But for a high schooler with aspirations to play in college and plans to work on specific aspects of his game during Sept and Oct, fall ball can be a good option. As with pretty much all things (especially pitching-related), I don't think one size fits all.
I -do- think parents ought to be prepared to step in on the fall ball decision if they think their kid needs a break to avoid injury or burnout.