Good question, hard to say, but I think it's mainly because of Zig. At its core Zig is marketed as a competitor to C, not C++/Rust/etc, which makes me think it's harder to write working code that won't leak or crash than in other languages. Zig embraces manual memory management as well.

Rust is more of a competitor to C++ than C. Manual memory management is sometimes really helpful and necessary. Zig has a lot of safety features.