This appears to be implying that rolling your own libraries from scratch is not a roadblock in C and C++, but somehow would be in Rust. That's a double standard.
Rust makes it easy to use third-party dependencies, and if you don't want to use third-party dependencies, then you're no worse off than in C.
Or, you know, leverage Go/.NET/JVM standard libraries for 99.999% of software and get shit done because there's more to memory safe solutions than just Rust.
Not to mention C/C++ dependency situation is a low bar to clear.
Rust makes it easy to use third-party dependencies, and if you don't want to use third-party dependencies, then you're no worse off than in C.