Not too unsimilar to Disney Parks having to start a month later than Universal to get all the protocols in place. Or saying they won't do it unless there's enough revenue from it.The cruise industry is saying that the hoops they would need to jump through are impractical and so effectively by keeping the order in place they can’t conduct business or at least not the way they want to.
The cruise lines can say it was too onerous, but it's mostly the same protocols the European cruises put in place. The same European cruise lines
they keep pointing to, that still have strict protocols, and say, "Let us do that!"
They can. All they had to do was a practice run with volunteers to show their protocols were in place; test everyone; and arrange for a sick boat safe harbor.
They chose not to going back all the way to November of 2020.