There’s a large world outside of JavaScript…

There is no company in this world that can avoid JavaScript.

Company using JS != company don’t use other languages/tools. It’s pretty obvious that JS is only a small part of the programming/tech world.

JS is the most widely used programming language in existence.

At the last company I worked at I only used C# + WPF (it was horrible). A couple jobs ago I only used R. There are companies with entire divisions that never have to touch javascript, and I'm certain there are companies that never use it. There's a very large world of programmers working for insurance/Healthcare/embedded/military/government that is nothing like modern web dev.