Because there have been many many times throughout history where people have adopted a foreign language in addition to their own, English being the prime example. Most people who speak English are not native speakers. There has never been an example of a constructed auxiliary language catching on in anything more than hobbyist communities and hippy communes.
People at large scale learn languages for practical reasons, not reasons of fairness.
History shows that's certainly not more likely, and no constructed language will be without bias towards some group of natural languages.
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Because there have been many many times throughout history where people have adopted a foreign language in addition to their own, English being the prime example. Most people who speak English are not native speakers. There has never been an example of a constructed auxiliary language catching on in anything more than hobbyist communities and hippy communes.
People at large scale learn languages for practical reasons, not reasons of fairness.
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