A few examples:

- Rust forces you to deal with errors and "null" values (Option). If you just unwrap them, it's visible.

- Rust requires systems with clear ownership. You can opt out with various smart pointers, it's visible.

- Rust requires you to use Box for heap allocations, it's visible.

Note: I'm not talking about optimal solutions in the sense of "best algorithm", more in the sense of "well thought out and without lazy shortcuts".

Yeah I think that's just called enforcing best practices, not optimal solutions.

One cannot enforce optimal solutions but one can prevent sub-optimal ones through proper checks.

You keep using that word, I don't think it means what you think it means.