The article’s title is misleading: “The Man Who Created a Written Language for the Cherokee Did It So Efficiently and Elegantly, His Peers Thought It Was Magic.”
His peers thought it was magic because they were unfamiliar with the concept of writing, not because his writing system was so efficient. He was put on trial for witchcraft because people thought he was communicating via magic. https://education.nationalgeographic.org/resource/sequoyah-a....
For those just encountering this like me, the man in question was Sequoyah, a monolingual Cherokee. His own tribe put him on trial, being overseen by his Chief.
Slightly different from what I’d normally assume had happened from just reading the above comment.
Really impressive on his part, basically saw it was possible and looked as some examples of what others had done, then got to work.