Rust provides all the safety guarantees of managed languages with none of the performance drawbacks. It’s precisely intended to replace C/C++ because the unsafe parts of Rust are used very sparingly and result in significantly fewer bugs and security vulnerabilities.

Safe abstractions for dealing with uninitialized memory efficiently are important in very niche scenarios to get optimal code out of the compiler and for reducing the ability to make a mistake when writing such code.

Reaching for C to do this is an emotional overreaction instead of calmly dealing with a small corner case that already has workarounds even if it does involve using unsafe

This is why we're spending substantial energy building better abstractions that don't require you to write any unsafe code.