Nobody is claiming gnostic info here. Most people just recognize the way the wind is blowing now. Even the CDC has finally bent the knee, and the Bermuda email people are passing around is pretty telling.
Cruise ships have long been dragged through the mud by the media for 24-hour stomach bug outbreaks, when such things could just as easily happen in any resort if merely one idiot neglects to wash his hands after throwing up. Somehow the resort gets a free pass while the cruise company gets public humiliation. This is why they've been (I will argue) overly cautious. But the resorts and tourist destinations are open (went to Vegas with the family last spring and ran into no restrictions whatsoever), inflation is about to beat us over the head, and cruises lose out on money from people passing them over for competition that no longer cares and will gladly accept money with a smile. At this point, the cruises are just missing out on money that should be theirs.
Personally speaking, I went ahead and booked one of the Adventure out of Galveston. It's not until next spring, and I figure the remaining test requirements will most likely go away by then. (And if not, well, we can cross that red-tape bridge easily enough.) But even 3/4 of a year away, it was slim pickings. When people open their wallets, businesses tend to listen.
(And for anyone who wants a laugh, yes, I did catch a stomach bug in Vegas!)