For the same reason no world leader with a brain in his head would negotiate with terrorists. When organizations are founded upon unscrupulous, immoral ideologies that seek the total annihilation of their enemy and lie with unconscionable proclivity, then any negotiations or agreements will be wholly one-sided. The unscrupulous organization will never honor their agreement but will fully expect the other side to honor theirs. Negotiating with such is utterly futile and will leave the honorable party in a condition far worse than if they had not negotiated at all. You attack and destroy terrorists; you do not negotiate with them.
USAPA can never be trusted to keep their word because they were founded upon the principle that binding agreements are meaningless if they aren’t to your liking. Like a terrorist organization, USAPA should never be trusted in negotiations – especially for their arch enemies the west pilots. Therefore, like a terrorist organization, USAPA must be utterly defeated with no thought given to compromise lest USAPA twist and distort every possible piece of yielded ground to the west’s detriment. The Cactus 18 should never admit to the fallacious, baseless charges, but should rather use every judicial means available to extract as much money from the corrupt organization as possible before it implodes.