Hm. They are pretty close to 100% safe, and that's in part because they are highly regulated. Also, when that review is done, it's not at all unusual for the regs to change.When planes crash we don't see calls for regulations to make it 100% safe, we have a system of review and determination of fixes, and then it goes on.
There are also laws/regs that cap their exposure.The airlines/aeronautics companies simply absorb the costs of the very (very) limited risk.