This is exactly the point I was trying to make. There are LAWS regarding the ethical treatment of elderly people with dementia and is the legal responsibility of the family to follow them.
In this state AZ (as I said) if these kinds of incidents occur even once the state can step in say "you MUST put her in a 24-hour care facility" and then you don't have any choice, you have to do it and pay for it.
It could even happen to you. Mo, now that she is here.
The cruise line is "the law" on a ship, and dementia is not a harmless condition - it is taken very seriously by the people who understand it. Old coots like this guy are shirking their responsibilities and/or in denial about the real situation.