Any argument can be made, as long as it revolves around the film itself, even a little off topic. If you must limit your argument to a few aspects, you can't write an excellent film review, because it also limits people's thinking. Once people's thinking is limited, can they still write good things? . Therefore, I don't agree with the answer on the first floor.

Take the godfather on the first floor, for example. A gifted scholar wrote a film review of nearly ten thousand words, including the analysis of the whole American society through this film, the historical events of the formation of racial relations in the United States, the real reasons for the rise of American gangs, and even the philosophy of being a man. Off topic? It's a little beside the point, because all these things are in the film, but it doesn't seem to be the point. But even if it digresses, people write well and others read it with relish. Therefore, as long as you write well and brilliantly, others won't care if you stray from the topic (of course, you can't stray too far, otherwise it will be absurd). But if you don't write well, even if it is a so-called "orthodox" film review, what's the use of others if they are sleepy? So the key is your writing skills.