Infinite time-loops + multiple alternate universes: the Crystal just keep punting you sideways until you find a reality you actually survive in. This is why once you drag yourself back to the boss that killed you in the first place you'll see all the same cut-scenes and not Titan being all "What, again? This is the tenth time today and you still haven't learnt to dodge".

I mean, obviously Ezorea is something of a many-worlds five-wagon-pile-up, what with every. single. one. of us being THE CRYSTAL BEARER, the first non-Padjal in centuries to be a White Mage (except for the six others in your FC), the first non-Ishgardian Azure Dragoon (except for those three you ran into a FATE ago), etc.