I never claimed that JavaScript was or should be used in any of the above. Just that it's "important in software engineering", by which I mean it's used or usable by people in 80% of the actual jobs in "software engineering."

I'd probably prefer to see a language like Go or Rust in critical systems. Self driving cars come to mind as well, but probably anything IoT or otherwise infrastructure related. But I think those jobs, all together, are a minority of programming positions.

I hope so, anyway, because I don't actually believe there are enough smart developers to work on critical systems if it's anything like half or more of the software engineering population. Most developers pretty well suck.