What do you mean just barely? They're exactly as safe as Rust. Perhaps they're not making it a selling point because it's been obvious for a few decades that automatic memory management tends to be memory safe.
In fact some languages are even safer (e.g. Scheme and various Lisp implementations don't have integer overflows due to having bignums by default).
In fact some languages are even safer (e.g. Scheme and various Lisp implementations don't have integer overflows due to having bignums by default).