Right, and you can do the same with C, using libraries providing this functionality wrapped as well. There's plenty of std::string and std::vector like containers, which handle the magic for you. But even then, you can work with struct {len int; void* data;} to get your vector, and replace void* with char* to get a string. A simple vector and simple string is in no way difficult to implement, and many implementations exist.

I'm just trying to point out that the convenience of some C++ standard library features is not isolated to C++, and C++ is not a "memory safe" language by meaning of the word.