We have a professional rugby league in the states. 2nd season started. I support the Glendale Raptors. In rugby you cannot hit from behind, you have to roll off the ball as soon as you hit the ground and the tackler has to roll off you, No leaving the ground to tackle, no lifting player off the ground, no hitting above the shoulders.
Personally,I know nothing about Rugby but a friend’s husband played in Ireland and quit playing when he started a family because of the chance of injury-——he did continue coaching a club team here in the USA.