Even if this were actually said, Apollo 13 was a failure as a mission.

Everyone got back safely, but the contractor who built the cryo tanks dropped the tank, tried to burn off the fuel overnight, unknowingly and accidentally exposed the wiring inside the tank to temperatures that far exceeded the design temperatures, which burned off the protective wire insulation.

That would (months later) result in the liquid oxygen in the tanks being ignited by a spark from the wire.

That was a procedural failure that lead to a moon-landing mission failure.

The point is, failures happen and always will continue to happen -- whether your program wants them to or not.