This seems like a false dichotomy, yet one that's argued all the time. The actual argument seems to be about the definition of the word "idea". Maybe the word

This seems like a false dichotomy, yet one that's argued all the time. The actual argument seems to be about the definition of the word "idea". Maybe the word "Titanic" is a bad idea for a movie. It's not even really an idea at all. The actual idea for "Titanic" was a very high-budget, ominous, cross-cultural love story with great special effects set on a famous ship. But at what point are we talking about execution? Execution is itself a series of good ideas to materialize a concept, right? What's certainly true is that "A Dilbert movie" is not a sufficiently developed idea for anyone to say whether it's good or not. Of course, the role of cultural critics is not to elucidate uncertainty but to make strong statements that others will read and argue about.