Rugby is a complicated game. It's simple enough to understand the two ways of scoring (tries and kicks over the post) but in order to score there are many rules to observe, and therefore many rules to break - all of which require careful watching of subtleties on the pitch. WHICH YOU CAN'T SEE IF THE BLOODY CAMERAMAN IS ZOOMING IN ON THE BALL.
You also can't see what the players are looking for when they're running - namely opponents, their own team in support, and gaps IF THE BLOODY CAMERA IS ZOOMED INTO THE PLAYER AND NOT THE GAME.
Are offending broadcasters sponsored by Gilbert or Nike? The BBC in England and Wales generally cover rugby matches well. But when we play in Scotland or Italy especially, the production crews don't have a clue.