Its a tough decision. My grandsom plays rugby at school. One of his team mates was tackled. Went down, hit his head and the injury resulted in him having a stroke. A higly intelligent young man, can hardly remember his own name now, and has had to learn how to walk all over agan.
It is easy for people to say MTFU, but i doubt people would feel like that if it happened to their own child. On the other hand, dangers exist in everything we do and everywhere we go. Maybe it is more a case of teachers being better trained, and instilling more discipline where the rules are concerned.