You seem to have the facts wrong. 55% of crops are eaten by people, 36% percent is animal feed, and 9% are biofuels.
So the majority of the crops are not grown for animal feed.
You have to understand that feeding the world population is not an easy task, and you need calorie dense protein sources to do so. We can't have the entire world turn vegan or vegetarian, it would be an environmental/economic disaster. Growing crops or raising meat are equally bad for the environment, each in their own way. The only real difference is, the suffering of animals. But to paint a picture of this vegeatrian Utopia and pretend it will be environmentally better is in my opinion, just a dream.