I do think in this sort of situation it should be more of a personal choice and people should be allowed to take risks if they want, if there could be a way to organise it so that people who don't want to take the risk can be largely unaffected. It is quite obviously counter productive to (perhaps) extend a very elderly person's life by a relatively short time using measures that make them utterly miserable for that time. But it's a sliding scale and presumably there are other people in the home so that also needs to be considered.
My MIL finally had to go into a care home this summer due to Alzheimer's. She was originally only supposed to go in for respite care but quickly deteriorated and will not come home again now. She knew who DH was before she went in, but she's got a lot worse now and she wouldn't know him now. He hasn't been allowed to visit her once and although FIL has been to see her a few times even he isn't allowed any more.
It's a terminal illness, she's not going to get better and she and her husband and children have been robbed of that last chance to have a real connection. She's getting great care from what it seems, but is unable to use phones or Skype or anything and without seeing her family we think she has lost that connection quicker than she otherwise would have. Of course it's a horrible disease in any circumstances and this situation was always going to come eventually but this has felt so particularly cruel. I'm not sure if there was any way to avoid it other than FIL trying to continue to care for her at home, but that really wasn't an option.