If the UAE (or any Arab country) sells oil to China or India, that will free up that same exact amount that China and India is already buying somewhere else this very minute, perhaps from Indonesia, or Russia.
Oil is a worldwide commodity. Each drop that is taken out of the ground in essence goes into a worldwide market. If we can't buy it from country X, we can buy it from country Y, AND THEY KNOW IT.
LOL That's a good one. China alone has over 3 billion people and probably less than five percent of them are currently automobile owners or in other ways consumers of petroleum products. But they are in the process of changing that. Both the people and the government want that change. Same in India albeit they have a comparably small population.