He could read your mind, best to ask is when parents are in the hight level of worrying. He beats you on that Khun Taya. Please, let him learn to protect himself in his own way.
Hope he recovers soon ka. Not sure it was the wrong decision. He loves Rugby and it made him happy that he got to play. Next year is another matter. My friend's daughter rides and competes in show jumping competitions and had a nasty accident, with the horse stepping on her temple when she fell. She had an operation and had to stop riding for several months. Now she's back and on her first competition she won a trophy yet again.