Apollo 13 was a success. The crew lived, the system showed itself to be robust. The Shuttle has ever been a fragile piece of crap, and deadly.
Apollo as a flight system never had a launch abort, although it came very close to one (Apollo 12, struck by lightning on launch, was seconds away from an abort). If they had to use the Launch Escape Tower on Apollo, there was only a 50-50 chance of surviving such an abort.