Well, let's put it this way.
The python cryptography package contains rust code.
The rust cryptography libraries are certainly not going to contain python code.
I wasn't clear, I mean, why should Rust have it's own implementation, with the cost and worries about correctness, and maintenance burden vs using an existing library, as is typically what other languages (e.g. Python) would do in this situation.
I don't see the benefit, that's what I was wondering about.
For some background, ring/rustls is a Rust library that replaces openssl because it doesn't have a good track record for vulnerabilities - especially those caused by memory safety issues.
I don't see the benefit, that's what I was wondering about.