The issue is that writing code that goes through a JS-transpiler is more complicated than just writing Javascript, unless the language you choose is Javascript-

The issue is that writing code that goes through a JS-transpiler is more complicated than just writing Javascript, unless the language you choose is Javascript-adjacent, whereas writing code that compiles to machine code is infinitely less complicated than just writing machine code. As to your second point, that's why I put it in parentheses, of course it doesn't refute your claim but if you use as example a technology that has awful documentation because of this two-language paradigm, and leads to garbage code both at the Python stage and the Javascript stage, to me it doesn't paint a good picture of the whole concept.