But I still like the passive voice. It sounds more impressive. Great writers routinely avoid the passive voice unless they have compelling reasons for it. Beginning writers aren't knowledgeable enough to overuse the passive voice. Even though the passive voice may sound impressive, we need to train ourselves to choose the active voice instead.
Good writers strive to be true, clear, precise, concise, and emphatic.
Sometimes you don't know who did the action. In such cases, choose the passive voice. You've made a good point. Lots of people writing for academic journals, especially in the sciences, do use the passive voice. I suppose they modestly consider the results of their research more important than they are.