Is it ethical to divorce a spouse with alzheimers?

Good morrrrrrrrrrrrrrrrrrningggggggggggggggggggggg! 🙂
Just rolled my lazy behind out of bed. I have a lot to do today so I will have to make a list. But before I do that, I’m hitting up the blog. This post has been sitting in draft for a few months. I thought of it because I was trolling the Internet and I saw somewhere that someone wrote that a famous pastor had advised him to leave his alzheimers stricken wife and get a divorce. It struck me as harsh at the time. So I wondered, is it ethical to divorce your spouse who is stricken with alzheimers?
I guess there is nothing per se unethical about it. But it’s cold, isn’t it? I mean, if it were your children or your parents would you turn your back? So why even think it with a spouse? I guess the realism of the thing is that a spouse with alzheimers is not the same person you married, are they? He or she doesn’t even know who you are. They are cognitively re-arranged. They can’t make love to you, communicate with you, ask you how your day went. This illness is cruel like that. It takes away all the memory, everything.
Should any reasonable person expect another to continue a “marriage” like this? Is this still a “marriage?” Well, yes and no. But the vows you took said, “for better or for worse, in sickness and in health for richer or for pooer, till death do us part.” Did you mean it? Or did you only mean so long as you don’t get alzheimers?