The problem with java is the language and how it works itself, and not the byte code idea.
I say that as a few things do that and .net, java and wasm are the first that jump to mind.
Hell, pure technically any programming language that is not asm does that :')
My problem is java itself, not its byte code. Wasm as advantage, imo, is that its not stuck to a single language like java is. .net blazor can build to wasm, but you could also use c++ to compile wasm applications :)