Google thinks it will die in the long run without social. They realize that all the tech-savvy software product in the world can be reproduced eventually, but secondary, human-savvy products, can never be reproduced. Furthermore, they see the power in adding ever more context to search - see Bret Victor's talk about how 'interaction' is bad, and inferring context is everything. There's no better context than social.…
So, your logic is that because human-savvy products can not be reproduced, it is incumbent upon Google to reproduce them?