Its a wonderful life...but not for you
Married With Children did an "its a wonderful life" riff once where everyone Al Bundy knew was better off without him. He said " i'm not letting them off that easy. I want to live!"
If an angel came to you and showed you what life'd be like if you'd never been born and all your loved ones were the BETTER for it, would you opt to give them the better reality by erasing yourself, or say no way, and choose to still have existed?