Most websites are obfuscated and optimized anyways. More people would be able to create FOSS web browsers and other web tools if they only had to implement a WASM virtual machine and web interfaces instead of having to implement this massive HTML/JS API/renderer/VM. I doubt it will happen though because that wouldn't be in the interests of Google who basically dictates web standards, they want to continue their near monopoly on fancy web stuff and getting people to use their products.