Reincarnation: Is there an advantage for non-believers?

[Tenet Nosce]

I decided to be born into a Catholic family/bloodline myself. So I suppose that's why I gave the example of a Christian, rather than say a Muslim. And yes, Christianity and reincarnation (transmigration of souls, metempsychosis) are not mutually exclusive, especially in consideration of the Gnostic texts.

But what I mean is... consider the pre-incarnative scenario where there is no veil. If reincarnation exists, then everybody already knows about it.

So then, why program these incarnations with the belief that this is our "one and only" life? There must be some kind of strategic advantage to pulling the wool over one's own eyes to such a degree...