A truer sample size would be if they were not quarantine to the rooms, and continued to interact then entire time on the cruise in all social settings. Then we would see how many people really got the virus and how many deaths there were.
But to take a group of people, isolate them and take all the same precautions that are being done in other areas, but then claim that that is a true example of the outcome is completely lunatic.
That being said, I also believe that the world is overreacting but that doesn’t discredit false narrative’s on both sides of the debate.