For some reason cruises bring out a lot of judgment in people. But at the end of the day, some people like cruises, others don't. Some people like exploring cultures, other people enjoy entertainment at sea. Some people like roughing it in an exotic foreign place, others prefer luxury hotels. The same person's preferences might change over time. Why do you think your preferences are better than someone else's?

This kind of judgmental attitude is the thing that's not worthy of respect, imo.