Do we want more NASA disasters?

If you have never been late for a plane, then you are not optimizing.  Is NASA making a similar mistake?

...NASA's costly and extreme aversion to it ever since Apollo. Recall the famous words of Gene Kranz ...  from the movie Apollo 13: "Failure is not an option."

The problem with that is, as some have responded, that success gets very expensive. This is the cost of risk aversion.