I’d say the baseline problem with the pro-benefits side is that by definition, a “survivor” is somebody who is STILL HERE when somebody else is not. These post-death IVFs are, by definition, NOT survivors because they weren’t in existence at the time of Daddy’s death.
A little like the basic fallacy of “natural” homosexuality: sex between two creatures who can never, under any set of circumstances, naturally conceive and bear a child together is, by its very definition, “unnatural”.
Of course, there I go using actual logic...sorry, my bad.
This sums it up pretty well. There was no survivor to give the benefits to until she created one. You are right on the money.