Yeah, except not completely broken with shit like "let's run python in the browser with javascript!" and "let's animate UI components originally designed to be static with an overloaded scripting language!" and a million other things. The browser and web were originally designed to view webpages (read documents) and not run arbitrary untrusted code...

tl;dr you are making the point I refuted in my original post.

Browsers have evolved into exactly what people wanted Java for all along. Except it evolved from the wrong base. Kind of like if an elephant evolved to have intelligence and communication like ours instead of monkeys. That's pretty much the DOM & JS.