Well you see, about 120 years ago, city governments in Alabama were passing local ordinances to try to treat black people slightly less like subhumans. The very fine people of the Alabama state government decided they couldn't be letting that kind of thing go on, so they rewrote the constitution to centralize 100% of governmental authority directly into the constitution, as written by the state government. Ever since, absolutely no act of governance happens in the state without having the state legislature go through the full constitutional amendment process.