Yes, the problems rust is solving are already solved under different constraints. This is not a spicy take.
The world isn’t clamoring to turn a go app into rust specifically for the memory safety they both enjoy.
Systems applications are still almost exclusively written in C & C++, and they absolutely do run into memory bugs. All the time. I work with C almost exclusively for my day job (with shell and rust interspersed), and while tried and tested C programs have far fewer memory bugs than when they were first made, that means the bugs you do find are by their nature more painful to diagnose. Eliminating a whole class of problems in-language is absolutely worth the hype.