You're probably right that Rust code isn't the most minimal way of doing this specific task, but I think the author's intended point was not "This specific task is best done by cross-compiling Rust for Windows" but rather "Rust is a viable alternative to using Python (or the like) for general-purpose cross-platform scripting; here is an example of something that's surprisingly easy to do with Rust". In this case, using a simpler example is just a way of making the demonstration of the concept easier, which I think is fairly effective.