If I got the to the point of needing 24/7 care and couldn't feed myself, use the bathroom or know anyone then yes I'd likely kill myself before going into a nursing home.
Kind of odd though. When we're born we're helpless and can't use the bathroom, feed ourselves, bathe ourselves etc and our parents take care of us 24/7 too. And sometimes when we get old we need that same level of care.
It was okay though when I was baby to need that care but once I get old and need that care then I'd rather die.