"Having said that, the music is full of memorable and beautiful melodies, I need not name them, they're probably in your head already!"
Yes. Feed someone a diet of faeces and may hit a few nuts every so often, believing that they alone have discovered something wonderful and unique.
Wagner's writing some good pieces of music does not justify the entire opera.
Just as Joe and James may have loved the theme song to Eminems film “8 mile”.
Would they now proclaim Eminem a genius and the film a great piece of art? Or would they recognise rubbish when they see and hear it?