That old chestnut Eric. You could apply that to many sports. Formula 1 is usually contested by only 2 drivers, The SPL, Bundesliga, and many other European leagues are only contested by a few teams, the Cricket world cup has only ever had 6 different winners, the football world cup has only ever had 8 different winners, Tennis grand slams, both men and women, are usually contested by the top 4 players etc etc.
For those posters on here who don’t like Rugby union, do the simple thing, and just avoid the thread. There aren’t many threads on here about it at any given time, and the clue is usually in the title.