In most cases, those "correct" C++ are also usually buggy in situations the programmer simply hasn't considered. That's why the C++ core guidelines ban them and recommend programs track ownership with smart pointers that obey essentially the same rules as Rust. The main difference is that C++ smart pointers have more overhead and a bunch of implicit rules you have to read the docs to know. Rust tells you in (occasionally obscure) largely helpful compiler errors at the point where you've violated them, rather than undefined behavior or a runtime sanitizer.