It would violate #9 no matter what implementation you use, and #9 is absolutely essential to tools like ESBuild, Deno, and Bun, which all rely on the assumption that they can nearly instantly strip out the type annotations and execute the code as JS.
That's because Zod doesn't use type annotations as input. We're talking about wanting to use type annotations as input so that we don't have to make our code as ugly as Zod makes it.