It’s worth noting that Kenneth spent the entire episode making the game (and the subsequent fight) as inclusive as possible for JJ and his disabled friends (all of whom were played by disabled actors/actresses).
To be totally fair to Willy Wonka, at least a couple of those candy factory casualties involved kids deliberately circumventing reasonable safeguards, sometimes aided and abetted by the parents who were supposed to be supervising them. What happened is at most 60% his fault.