A small detail question first;
The preference for a holiday, let alone a "holiday at Algrave" is not something that just wells inside of us like some primal desire. — schopenhauer1
So how do birds migrate then, if nothing as complex as the desire to journey to a specific other place on the earth for a set period of time before journeying back again could never evolve without language?
Regarding your main argument.
So humans, like all other animals, at one time had a set of genes that coded for the innate desire to raise young, if we hadn't have had we would have become extinct. You're suggesting that at some point in our evolutionary history, we lost that set of genomes entirely but immediately (it must have been immediate otherwise we would have become extinct within one generation) it was replaced with a convergently evolved set of genomes coding for complex language functions which allowed us to develop cultural preferences for raising children, just in time to save the human race from extinction.
So a few questions arise.
1. What would have been the competitive advantage of the mutation that replaced our genetic sequences coding for an innate desire to raise young? Presumably, not having answered my religion question, you believe in evolution by natural selection. Whatever it was must have been an incredibly strong influence for the new mutation to have swept through the entire species, but I can't quite see how it would have given anyone a competitive edge over those naturally invested in raising young.
2. If there was a competitive advantage to not having a desire to raise children, how come it was immediately replaced with a cultural desire to have children, wouldn't those cultures have faded away almost immediately as a result of whatever competitive force was driving this massive shift in genetics?
3. When did this sea change in our genetic coding take place. It must have been after complex language and culture because it needed to be replaced immediately with the cultural urge to have children in order to avoid extinction, yet paleobiology has yet to turn up any significant change in the human genome since then. Is this something you predict we're gong to find out in the next few years of genetic research?
4. You mention convergent evolution, but this refers to the novel arrival of features via two evolutionary paths, what you're proposing here would not be an example of this. We've established that it is a biological necessity that humans had a genetically innate desire to raise young at some point in their evolutionary history. What you're proposing here would be the the novel emergence of a trait
already present in the organism, but emerging as a result of a different force and then entirely supplanting the original gene(s). This is, to my knowledge, completely unprecedented. Are there other examples of this happening in the animal kingdom you're working from, or is this the first time this has happened in evolutionary history?