It's the opposite - pointing out that X can just as well be implemented in language Y is the irrelevant point because anything can be implemented in any turing

It's the opposite - pointing out that X can just as well be implemented in language Y is the irrelevant point because anything can be implemented in any turing complete language. Where languages differ is what they make easy to use, or first class. As an example consider Go's autoformatter gofmt. It got released with the language, pushed and marketed as the way to format your code - first class. As a result, virtually all Go code is uniformly formatted. Contrast that with autoformatters in other languages pre-Go. They existed, but often multiple per language, each with hundreds of configuration options, all with minimal uptake in their ecosystems.