Care homes are where you get sent to die by relatives who dont care.
Ouch... As someone who comes across as caring little for anything or anyone other than themselves (I could be wrong but that is how you come accross to me), that's ill informed especially by someone with a PhD.
You, apparently, know nothing about the loving bond most families have. How, because of your own age and frailty, you do more harm than good by continuing to try to care for the person who has been the love of your life for, say, over 50 years. The heartbreak and guilt of having to make that decision.
I envy you. You will never experience it. I know, however, it is because of a life that has been full of joy, love and happiness that people feel guilty that they can no longer do their duty. Something else you will never know I expect. Have a heart.