Hmmm I read the analysis and I don't think it's all that meaningful: just like numerous other films Inception has some themes which it explores (regret, guilt, grieving/loss). If the exploration is insightful enough, then the audience can learn from it. Is Mighty Ducks a metaphor for filmmaking because emotions are just as real in a hockey match as they are in a movie, as they are in real life?

The film touches on some ideas like the intoxicating power of the imagination but I think saying the whole film's a metaphor for filmmaking goes a bit far and the evidence is stacked against his analysis.