I have also noticed that the dance music played at homecoming is very much redundant. I am going to remake a point I just made in another response. Composers have developed methods in order to avoid repetition much more so than modern dance composers. I used the example of Sonata Allegro Form, which helps you by providing guidance for writing longer works without sounding too repetitive. I don't know if it is necessarily laziness that causes people to write repetitive music. I think it is a lack of knowledge in how to write a longer work and not sound redundant. However, I am sure that when classical was first starting out, composers were much more redundant. I feel like repetition is an issue that may be solved for other genres as they are given time to develop their own methods of avoiding repetition. Classical composers have centuries of knowledge and experience under their belt. Thank you for the feedback!