Guinness and Ford are just two subjective individuals in a world that, overall, tends to love the original Star Wars films. Their opinions, as I understand, were also based on their acting in the films, not necessarily watching them.

By objective, I mean that there are overwhelmingly positive measurable data points that indicate the success of the original trilogy as compared to most other cinema. If you want to argue against that data, I encourage you to write your own article.