It's troubling that airlines require reliability redundancies in order to maintain safety. The reinforced cockpit doors were good solution, and then...Germanwings happened. Wow. I just don't know if I even want to fly commercial anymore.
Realistically the risks here are so low, that you're really unlikely to be affected. There's a lot of risks you're frequently exposed to, that are higher.
https://www.youtube.com/watch?v=8QTq-HEEnn4
"The Obvious Solution To the Airline Problem (United Airlines)"