Rust is not more complicated than C++; you actually have to be thinking about the concepts (ownership and lifetimes) in C++ too, there's just no compiler help,

Rust is not more complicated than C++; you actually have to be thinking about the concepts (ownership and lifetimes) in C++ too, there's just no compiler help, so it seems like you don't. (Well, you get some help: the compiler inserts (arbitrarily expensive) copies of your data for you.)