Based on your speculation if a travel agent sold you tickets to Cuba and you were assaulted in Cuba then the travel agent would be liable?
For all those who dont read the cruise contract...
12. INDEPENDENT CONTRACTORS, SHORE EXCURSIONS, AND OTHER SERVICES
(a) Guest acknowledges that all shore excursions/tours (whether conducted in the water, on land or by air), airline flights and ground transportation, as well as the ship’s physician, and on board concessions (including but not limited to, the gift shops, spa, beauty salon, fitness center, golf and art programs, video/snorkel concession) are either operated by or are independent contractors. Guest understands and accepts that Carnival may prohibit Guest from going ashore in any port of call, and/or or limit Guests going ashore to specific activities or excursions authorized by Carnival, for public health-related reasons in its sole discretion. Even though Carnival shall be entitled to collect a fee and earn a profit from the ticketing or sale of such services by such persons or entities, Carnival neither supervises nor controls their actions, nor makes any representation either expressed or implied as to their suitability.