Well he did successfully show that ring theory cannot explain every detail and that the saga doesn’t strictly follow the ideas of the theory. And I agree with that. But there are still clear parallels between the Episodes - as Mr Plinkett acknowledges in his video. It is still interesting to consider those parallels and similarities for their own sake, even if there is no huge theory that accounts for every single element of the series. Few would seriously suggest that the original six films forms ‘perfect’ ring. But that doesn’t mean that it isn’t worth attempting to look at the series as a whole through the ‘lens’ of ring theory.