American flying planes over water without life rafts?

American has been caught flying plans from DFW to Cancun without life rafts. These are older A321 planes that came from their purchase some years ago of US Air — these jets flying to and from Cancun “hug land” instead of flying over any water — so “technically” I guess they don’t need life rafts?  The flight takes about half an hour longer and burns way more fuel.  Is this a safety issue the FAA should be concerned with?