I suspect "Rust is fast/low memory utilization" is the more common value proposition, with memory safety as the bonus that can push it over other fast languages.

Related: If AI writes your code, why use Python? (which notes why Rust has taken off for LLMs) https://news.ycombinator.com/item?id=48100433

Zig is every bit as fast with typically even lower memory footprint as Rust. The main thing Rust promises that Zig cannot already do natively is memory safety. This is not about Python vs Rust. It is one systems language vs another.