The dark ages is a term for a place and time in European civilization, complaining that it doesn’t apply to other parts of the world is irrelevant. By following your argument, the Islamic Golden Age not adequately describing the conditions in Australia or the Americas means it should not be used either, when this clearly misses the point that the Islamic Golden Age focuses only on a specific part of the world during a specific time frame.
The dark ages is a term for a place and time in European civilization, complaining that it doesn’t apply to other parts of the world is irrelevant. By following your argument, the Islamic Golden Age not adequately describing the conditions in Australia or the Americas means it should not be used either, when this clearly misses the point that the Islamic Golden Age focuses only on a specific part of the world during a specific time frame.