Tell that the the families of passengers on Flight MH370."
Oy gevalt! This again? When minimizing risk, you have to invest where you get the best returns in lives saved. Obviously, in retrospect, after an accident, you'll wish you had spent infinity on having more safety, but that's the wrong way to think about it.
You should instead:
1) figure out how much you're willing to spend per statistical life saved
2) deploy safety measures up to that point
It's not always going to make sense to keep throwing on all kinds of safety equipment simply to handle every black swan event you can think of -- remember, they do log airplane location remotely and continuously; it's just that that still wasn't enough in this case.
You might as well advocate that planes start giving everyone a parachute, without realizing it makes flight so unaffordable as to push people to less safe modes of transportation.
Comments like these promote a worse understanding of the issues.