I'm not saying that Rust is not a good language for UI, and im also not saying UI is simple. The problem is that you are just comparing it to JavaScript which is untyped and easy to beat.

In my case i'm comparing it with languages that are also powerful, safe, fast and more well designed for this kind of scenario, which JavaScript or Python aren't.

But if i had just two picks, between JavaScript or Rust, of course i would choose Rust without blinking. But once there is more options.. (in this case you can read my comments above).

And i agree with you, that if you sum it all, maybe you get more productive (as in ready to ship) in Rust than with JavaScript.