Yeah, these kind of statements feel very “empty” to me. That’s probably true that you could do everything with Nim, it’s also true that you can do everything with every language. Should you? That is another question.
Given all that, what are you still looking for to make the statement non-empty?
Along with general language characteristics such as being high level and productive like Python, but with intricate "bare metal" control when you want it, really does make it suitable for writing almost everything.