Getting concurrency right is difficult, even in Go (I know, I have been there, it was a huge pain in the a$$). Rust guarantees via the borrow checker that the code is data race free. This alone is a huge advancement. I would argue that Rust contains as much boilerplate as Java, but Rust is as fast as C++ and safer than both.

-> You trade some code noise for safety and speed. Compared to C++ the code has even less noise.

Turning code into concurrent code is super easy in Rust. Just use the Rayon crate and change iter() functions into par_iter() and you are done (if the borrow checker doesn't complain).