[alexschnapp]

This is just assuming that the offspring survives just like the parent and reproduces.

If the offspring requires parenting, the parent, once an offspring, also required parenting and so on.

This is not moving the goalpost, it’s doing the similar things adapted in some ways for the environment every generation.

I assumed you were talking about humans. For salmon, the definition of a successful reproductive cycle is simply reproducing. For humans, it takes longer and requires parenting. But genes don’t get selected away when it’s passed on to the next generation.