Many people are not grateful that their parents brought them into the world, they think it's disgusting selfishness and that they are victims of it. How about this?
Not agreeing with the original point, but what's the alternative? You can't be nonexistent. "parents brought them into the world" this seems like a conceptual error imo. Brought from where?
Mother: "Well, actually we didn't know that it would be you"
<long beat>
Mother: "We were hoping for someone with a job"
- stand-up comic Mrs. Hughes