Rust is absolutely a safe language, and in more ways than just memory safety. The only way to get unsafe code in rust is to opt in to unsafety with a keyword that can easily be checked for, so that you can decide for yourself to enforce that no code in your project uses it.

And unless you are writing a few specific types of code, using unsafe usually isn't ever necessary at all.

The complexity is also very much not an issue in practice. If you rub up against complexity in C++, you might not even know it. UB could be silently ruining things. If you rub up against complexity in rust, you were either just saved from yourself, or you are hitting part of the language that is probably undergoing improvement. But you never have to worry about complexity silently making things worse.