What if she awakes on the next world and realizes the answer to her prayer was that everyone on this world dies? That this world cant be our permanent home, that we were never supposed to live on indefinitely on this world because there is much more after this first stop?
Everyone in this world doesn’t die at 21, so the answer you’re offering to her prayer amounts to nothing more than doublespeak.
If this is the type of answer your God would offer, He’d make a great politician.