As a devoted and long-time Rust user, I'll tell you: by all means, use the language in which you're most comfortable and/or which seems best suited for the task!

Rust is not meant to replace every single language on Earth. Rust is, as you mention, a better C++, with great predictability, great safety and great concurrency. That's a feature set that's critical for some classes of applications, but absolutely secondary for others.

It's a good thing we have more than one language to pick from :)