We all do our own cost/benefit analysis every time we get in any vehicle for transportation. There is no such thing as absolute safety in any form of transportation. Where the line is drawn is the question.
For example, I have a simple, cheap,procedure to completely eliminate the threat of midair collision. Only allow one aircraft in the air at a time. This solution has not been found to be acceptable to the marketplace, however. All parties have accepted the risks associatied with many aircraft in a small amount of airspace.
It's all about choice. No, make that money and choice. No, make that choice, money, and lawyers. No, .....oh, never mind!