True.
> or poorly maintained aeroplanes
But that's not something a person can affect by their choice of whether to fly on such an airplane, which is what we've been talking about, assuming the airplane is already in operation. That risk is being imposed by the airline that's skimping on the maintenance.
People can affect this indirectly, by choosing not to fly on unsafe airplanes, which will cause airlines that try to operate such airplanes to go out of business (as well as manufacturers who try to build them). Indeed, that's what I was describing when I described how a free market would result in unsafe airplanes not being flown.
Your position, in the other subthread where I responded to you a little bit ago, appears to be that people are too stupid (excuse me, "unworldly") to be trusted to regulate such things as I've described in a free market, so governments have to regulate instead. Have I got that right?
