Sorry but I can blame a business for taking my money, allowing me to plan a vacation and then cancelling. Of course they are greedy, If they took this sailing "away" for a charter they only did it to enhance revenue which is greedy. We have award tickets on United going and Air Tahiti Nui coming back. There are no award tickets for the return until at least 2025. Most of us, if we are not retired, have to plan vacations around work, school and family. It is not always easy to modify these plans with only a few months notice.
The thread you copied provides a year notice to change plans. While not ideal either, at least no airfare could have yet been booked and there is more option to change. 3-4 months notice is unacceptable. They also are requiring any rebooking to be done for a 2024 cruise. At least for me that is impossible as my only available time off is during the summer months.