Sites written by hand don't need RSS. If you absolutely need RSS, you can start a WordPress blog before you can say "what the hell is XML?"
People might want to use RSS to check on your site for updates whether you write it by hand or use some kind of CMS to generate it for you.
WordPress was a technical mess before their founder had a psychotic break and their company posted features advocating for business owners to put bait-and-switch AI slop on their websites.
What do you think RSS is for?