I think you and I read that sentence differently. I don't believe the author of that post meant that physical exercise is a bad thing in schools, but rather sports stars should not be "better" or "different" from any other student. At my school (and a lot of schools judging from people I met in college), we had dozens of sports but only football and basketball players were routinely excused from class for practice, drills, and travel to games. Only football had their travel expenses paid for by the school. You were at a severe disadvantage if you decided to play any other sport.
What I read that post as saying is "sports should be extracurricular activities that do not interfere with or take the place of education". This doesn't necessarily preclude your normal PE classes.
What I read that post as saying is "sports should be extracurricular activities that do not interfere with or take the place of education". This doesn't necessarily preclude your normal PE classes.