Unfortunately we don't live in a world where it's possible to know one language and still get hired in a job where a different language is used. To future proof

Unfortunately we don't live in a world where it's possible to know one language and still get hired in a job where a different language is used. To future proof our careers, we quite often have to dedicate ourselves to learning not just the qualities of a language, but also the syntax itself. We need to be able show some evidence that we can hit the ground running. I also think that if you work in a non-opinionated language, it can be very informative studying some of the concepts used in opinionated languages. Perhaps you could say the language is a medium used for learning higher-order concepts that would be hard to understand in isolation. Quite often those concepts are very useful and can change your thought processes. An example of this is the rise of functional programming techniques in JavaScript. I agree with the point of not limiting ourselves to just purely technical programming knowledge. It's surely about finding the right blend.