I don't think anyone is suggesting that WASM is the new way to write for the web, but I think it's certainly an aspiration that WASM will allow more languages to be used for everyday web development in addition to solving other more niche problems.
It has not been my perception that that's an aspiration or a goal of WASM, but there's much I haven't read. Can you point me to where this is stated as one of WASM's goals?