> You need unsafe in Rust just to [implement] a doubly-linked list.

And? That's what unsafe is for.

Yes, I agree, you can implement a doubly-linked list in Rust exactly as you can in C, with the same precise control.

You can even implement intrusive collections: https://docs.rs/intrusive-collections/

Unsafe is a normal part of the language, and how you manually implement precise control behind a safe reusable abstraction whose correct use can be verified by the compiler.

Do you have any examples of precise control you can express in C, but can't express in Rust?