Keith write: "So you tell me who decided that technique."
You did. If any real situation, Uke gets hurt when they don't follow Tore. You chose the technique, he chose to protect himself. If you want to teach your students to fall that well, smack them in the mouth during a tenchinage or something. (Obviously not hard enough to injure etc..) I learned quickly when I was confronted with that one.
Besides, they need to learn to fall at the moment of _impact_. If they fall before contact a time will eventually come, on the mats or on the street, where contact is made, and they'll probably lock up and fall badly.