Because they're justifying a project whose sole difference to the other implementation is the language its written in.
than
"We did it in Rust, and we believe it's better because ..."
?
> However, those projects are written in platform-specific C, a language considered unsafe compared to Rust
Or to paraphrase it using your wording: "We did it in Rust and we believe it is better because it does not have memory unsafety issues that are the number #1 reason for security issues every year"
"We have security issues every year because we program in unsafe languages like C, and to solve this, we should start rewriting things in Rust because it's 'memory safe'."
Amazing!