I have just lost my nan, who has used her savings and home to pay for fees for the best part of 2 years after succumbing to dementia.
Yes, it was a lot of money, but it meant we were able to decide where she lived - a lovely, small, privately run home, close to her hometown. If Social Services had been involved, she could have been placed anywhere in the County, we would have had no say at all.
I understand the thought of 'losing' the money is hard, but if it goes towards paying for a home for their most vulnerable years, I think it is right.
My understanding is that if the home is occupied by then both, then it will not be required or counted towards the cost of fees should one need care but one stay at home, though that may not be accurate (my Nan was a widow, so lived alone).
You could look at it in a different way - if they decided to move to Warden/monitored accommodation, or indeed into a retirement apartment on one of those nice complexes, it would still cost them money, and potentially require annual fees and/or in-home care.
I totally get where you're coming from. Of course, my family had similar discussions. But ultimately the home my Nan lived her days out in was just that, her home, and though it was expensive, she was cared for, loved, well fed and very comfortable there - her life of hard work and managing to own her own home supported that and enabled her to live out her final months without any worry.