You described differences between Asians and blacks and Latinos. I don't see why that means Asians don't contribute to diversity.
Personally, I've given up trying to argue with people on this matter. Some view this sort of reverse-discrimination as some sort of noble social-correction mechanism, I just view as what it is. Because, to me, at the end of the day, we are dealing with individuals. And sure, we may be uplifting certain individuals, but at a cost of other individuals purely because their gender/race was previously benefited in some way.