The reason religion is so powerful

[The Architect Of Fate]

There is a shift from the logic-based approach of Nagel's argument, to an affect-based approach in Fake Messiah's scenario. For example, perhaps we are evolutionarily wired to value the survival of babies in ways that we are not for the survival of zygote

Given that he is questioning the logic of the Nagel argument, his formulation doesn't quite address that.

Nope the scenario remains the same and yes it does address it

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I think the reason we would choose an infant over an elderly person (and you hinted at something similar) has something to do with Thomas Nagel's famous argument: Death is evil insofar as it deprives us of life. Therefore, the younger you are the more life you can be deprived of, and the more tragic the death. And abortion, I would argue, logically deprives an organism of the most life possible.

So that means that you would rather save ten frozen fertilized eggs than one baby or one older person from the fire.