In rugby its all about getting control of the ball. So your emphasize is tackling the ball more then a “big hit” on the player. When the knee hits ground you must release the ball, basically its a “controlled fumble”. If the ball is free then play continues, if the ball is contested then a ruck or maul forms. This is a “pushing contest” with very specific rules abut how one gains possession of the ball. I could go on,, but the dog is demanding to go out!
When the dog wants out, the dog gets out! I have become a recent fan of the game first watching 6 Nations games and now Premiership which is broadcast on NBCSports. As I watch more, I am understanding the game better. I appreciate the fact that the English announcers appear to be both apolitical and very knowledgeable.