What does `@ExceptionHandler` combined with `@RestControllerAdvice` give you that a plain try/catch doesn't?

It centralizes error-to-HTTP-status mapping in one place instead of repeating try/catch blocks in every controller method — throw a domain exception anywhere in the call stack, and the `@RestControllerAdvice` class intercepts it globally and converts it into a consistent JSON error response with the right status code, keeping controllers focused on the happy path.