You could say the same about any categorisation. There is a reason why you are a human, a mammal, an animal, a life form. Those might seem unnecessary labels but they tell us what you do, what you are capable of. Same with languages.
There is a point at which all meaning is lost in detail, and that is in general, not where you want to be. Hence my approach to try and find a lowest common denominator that lessens my own cognitive load.
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