Yes, the traditional 5-paragraph essay provides structure, but it is presented too rigidly. No room for rhetorical purpose, topics, arguments, author innovations.
"If you make your classroom an environment in which students are used to bringing up and discussing what is going on in the world, if you listen carefully o their reasoning and help them understand their own and others' perspectives, and if you offer them chances to read and compose texts in an effort to influence a variety of audiences, your students will have greater knowledge of the world outside the classroom and of themselves as effective actors in it." (Duke, p. 162)