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Minified JS is probably not much more readable than decompiled WebAssembly compared to full source code.
On the other hand WebAssembly is faster, safer and can be a target for any language.
That said running random code downloaded implicitly from the internet as you try to read some text is a bad idea regardless how you implement it.
I bet that if browsers natively implemented top handful of ethical use cases for JS most websites would not need any scripts to work.