Yet the laws of the game specifically allow a tackled player (ie brought to ground) to score a try.
The notion that Law 13.3 trumps Law 8.2 is a personal interpretation. A more widely accepted interpretation might be that if the LoTG don’t specifically forbid something, then it’s allowed. I accept your point of view that the ramifications of 13.3 are tremendous. However WR will have to adopt a top down approach to implementing this «*change*» (it isn’t a change at all, since the idea exists since the beginnings of the game) That is to say, elite referees will have to penalise professional players who play the ball when off their feet, at the tackle/ruck/open play and not just get strict about one or two Law references. Then the mini/midi/maxi age group will grow up accepting this interpretation, since it must be true if they have seen it on the telly.