If you could explain the point your were trying to make with your anecdote, perhaps we could reach some common ground. I merely explained that the gentleman that you met in a supermarket had every right to choose where to live, as he pleased.
In the process, could you point out which information you actually received from the gentleman, which information you deduced from the conversation, and which information that you assumed. For instance, was he living full time in Portugal? Was he registered for medical care in Portugal? Did he have top-up insurance for medical care in Portugal? Did he have a condition that he was prepared to divulge to you? Did he have any other reason for returning to UK? Was he retired? Was he a pensioner? Had he return to UK full time? There are loads more such questions.
I let an old fellow in front of me in the checkout queue because he had a basket of goods while I had a trolly full.
We got talking.
He told me that he had moved to Portugal with his wife many years ago and that she had died there a few years back.
He lived in, he said, a beautiful national park bordering Spain. It sounded something like Ever..... I remember him saying it was spelt with a PH. He told me to look it up on the net but I never found it.
I know nothing about his health care arrangements only that he had returned to the UK for treatment that he couldn't get in Portugal. I didn't ask him why.
I have met/worked for people that have returned from Spain and France for the same reason.
Can't tell you anymore than that.
I have just finished working on a new build where the couple sold the mobile home they were living to a couple returning from Spain. They are returning because of brexit and what it might mean for them.