If YOUR grandma dies in a nursing home at whatever-age, it’s tragic and terrible, regardless of what age.
My paternal grandma’s sister-in-law is 103. I very much don’t want her to die.
Sure, it’s somewhat easier to accept that people die in old age. But it’s never EASY. My paternal grandmother died of cancer at age 80. My sister and me took turns during the funeral, being absolutely devastated and comforting the other.
It is ALWAYS TOO EARLY for a loved one to die.
(Edit. I fumbled that, the first time around. Unless the loved one is in excruciating pain and no cure is available, it’s ALWAYS too soon.)