Because the people who've been doing the work caring for the chimps before this ruling probably have a good idea of what will / won't work with the individual a

Because the people who've been doing the work caring for the chimps before this ruling probably have a good idea of what will / won't work with the individual animals. Some people decided to make laws with hard and specific rules without considering the downstream ramifications. It's a social failure to adapt to the situation. We must ignore the experts because the rules say so. We must kill the chimps from stress by moving them because what the caretakers have to say has no standing in the legal world. If "the law" is on your side there is no slope too slippery that can't overcome pesky constraints of morality or reality.