Yes, “take this clever code written by a smart human and convert it for WASM” is certainly less impressive than “write clever code from scratch” (and reassuring if you’re worried about losing your job to this thing).
That said, translating good code to another language or environment is extremely useful. There’s a lot of low hanging fruit where there’s, for example, an existing high quality library is written for Python or C# or something, and an LLM can automatically convert it to optimized Rust / TypeScript / your language of choice.