That’s not a definition for scripting language I’ve ever heard before and it’s neither true nor desirable. Even JavaScript has a standard library - think about things like Set, Map, Regexp, Promise, etc. – because they’re universally useful, as opposed to the runtime environment where things like the DOM are less relevant to many use cases. JSON is a great example of something crossing over as an increasingly high percentage of projects will use it.

Not having a standard library on par with other scripting languages just added overhead and incompatibility for years as people invented ad hoc alternatives, often buggy. The accelerated core language growth has been hugely helpful for that but you still have issues with things as basic as the module system which exist for understandable reasons but are just a waste of developer time.