You're conflating why people want to rewrite it in Rust vs what is the likely end result i.e. I do think people want to rewrite things in Rust because they believe long-term it will mean fewer (memory safety etc.) bugs especially because there's been almost no meaningful improvement in this space for a long time. But of course in the short term it will mean regressions compared to the established C written version.

That is different from AI where the calculus seems to be that if AI isn't involved, it aien't relevant.