I fear it's going to happen again; Orion isn't safe and hasn't been successfully tested. The heat shield started to disintegrate the last time they tested it and instead of testing it again with their changes they're going to put people in it next time.
Armstrong's personal estimate of his odds getting back alive were about 50%.
Apollo 13 came within a hair of killing its crew.
I fly across the North Atlantic at 30,000 feet, death in seconds if the hull is breached, in a comfortable chair, watching a movie and sipping a drink. Isn't that incredible? I still find it amazing.
But I know that was achieved through the loss of many, many lives.
It's also entirely reasonable as an American to discount Polio / Ebola and a lot of other stuff that' aren't an issue for them. It doesn't mean that worldwide they aren't a problem. But historically, we've had systems to ensure these things aren't problems so when they become problems its newsworthy.