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Other industries have. And if you don't think flying would be safe, you'd be free to not fly.
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Broadcasters didn't self-regulate to establish property rights over specific bands. The airline industry didn't self-regulate in the example I provided. Which industry do you feel is entirely self-regulating?
The question is not whether I think flying is safe or not. The question is whether the risk is, was, or even could have been
voluntarily reduced. As you move forward in time from the innovation of powered aircraft you'll see that few if any of these regulations came from the operators.
Perhaps I am misunderstanding your interpretation of Objectivism. The Objectivist says that a rational individual will not want to die in an air crash. The Objectivist likewise says that a property owner (the airline) will not want his customers to die in an air crash. Therefore, as these rational desires connect, organically, the property owner will develop CVRs and FDRs on his own, flight path agreements on his own, investigation and security processes on his own, and so on. If he does not then the rational individual will not use his services, will choose a competitor, or will stay home.
However, this isn't how aviation safety developed at all. The property owners did whatever they wanted until the appropriate regulations and institutions were put into place and (apparently) rational people kept boarding aircraft in spite of the risks.
That's only a solitary example that's well-documented because the technology allowing powered flight is so new. We could go through each sector with a fine toothed comb and likely discover that the rule is that rational individuals with unfettered property rights will make calamitous decisions until otherwise "coerced".