We put my gramps in a home when it became apparent that he needed full-time care. But the atmosphere was just so downtrodden with death. Illness was everywhere and many people were disgruntled. Patrons are dealing with the fact that they'll die at some point in the near-er future and/or might only be half-sane anymore and basically vent off at the workers. (mad props to care staff people, as I've had several friends who do that and they always come home with multitudes of horror stories....not mention any bonds they do develop with their "favorites" that get shattered when they die).
So anyway, yeah....we decided to not put my grams in a home...even in her last days.
It's a tricky question though.....some people just can't care for someone all the time, and can't afford to hire full-time in-home help. And so then, at the risk of seeming like an uncaring family member, you may have to decide to put that person into a home. There's no doubt in my mind that homes are about the last place on earth I would want to be. Death, boredom, loneliness. But sometimes they're also the last resort.
...personally I think I'll choose to forego full-time care when/if I get to the point where I can't do remedial things anymore, and probably die a happier person for it.
but to have to make that decision for someone else.....I can't imagine having been in my dad's shoes.