Exactly. At some point, most people will choose to forget, for their own sanity. We’re talking infinite repetition. How many times could you help someone for literal eternity before the acknowledgement that it’s futile hits, or the number of times you’ve had to put a loved one out of their misery pushes you over the edge?
Point being, that it doesn’t make a difference. All it really does is make you feel briefly better for trying to help. Next day, back to suffering.