You can write memory safe code in any language, but having a machine i.e. the Rust compiler check it for you is less error-prone than if a human does it.

Also if you look at the repo, only 3% of the codebase is in Assembly. IMO if >95% project is in Rust, you can definitely claim it's a Rust project.

Finally, a positive comment about Rust that I can 100% agree with :)