No, I cannot imagine anything worse. You would be in a far country where everything looks different, feels different, where the carers however kind and competent wouldn't be ableto share any moments of contact over tv programmes and common cultural links.
One of my family went into a very nice care home in the UK where all the staff were Phillipinas, they were lovely people but there was no one in the home who had any experience of our ways of living, how our family life was, education system and certainly knew nothing of tv programmes over the last 50 years.
I was glad that my relation needed to move to somewhere near his family where the carers were more mixed, with Philipinas, but also carers of different ethnicity, most of whom had spent their lives in the UK.
I think the whole idea is quite offensive, treating old people as so much lumber, to be farmed out to anywhere in the world that can look after them cheaply, without any consideration of their interests, family connections, where no-one can visit except at great expense - and what will happen when they die? Will their families have to pay to bring their bodies back to the UK for burial or will they be consigned to Thai crematorium for an anonymous cremation.
Hetty a lot of elderly people on permanent cruises? Really? How many? What proportion of all those in care? What is the source of your information.