I always hear this back from people, but it's a failure in understanding what's being said. You can't conceive of any future "knowledge" or state of being or most broadly, "configuration of reality" which could retroactively justify or "make right" proven and real human suffering already suffered. That is just not possible to you.
That is what you're saying. It's isomorphic to your argument; it is your argument's essence.
Expressed that way, the issue becomes apparent. We cannot conceive of something; it is inconceivable. But that inconceivability is exactly what the original argument is asserting - it's a thing beyond human conceptualization. Exactly.
All parties to the argument find agreement on this point.
That is what you're saying. It's isomorphic to your argument; it is your argument's essence.
Expressed that way, the issue becomes apparent. We cannot conceive of something; it is inconceivable. But that inconceivability is exactly what the original argument is asserting - it's a thing beyond human conceptualization. Exactly.
All parties to the argument find agreement on this point.