Perhaps grammar is not about correctness. Perhaps it is about attention. And Autumn, I think, has earned ours.
Proponents of capitalizing "autumn" argue that it is a proper noun, referring to a specific season of the year. They draw parallels with the other seasons, which are often capitalized: Spring, Summer, Fall (or Autumn), and Winter. This approach is consistent with the general rule of capitalizing proper nouns, such as names of people, places, and holidays. should autumn be capitalized
If you're writing for a publication that adheres to a specific style guide, it's best to consult that guide for guidance. In general, however: Perhaps grammar is not about correctness