That really seems like a genetic flaw. A baby that is incapable of breast feeding...how does it survive long enough to ingest solid food in a state of nature?

I know there are parts of the world where lactose intolerance is the norm for most of the population, but having that inability to drink milk right from the start seems really weird. I would've expected that to be something that developed over time so that the infant could breastfeed initially at least. It doesn't make sense to me from an evolutionary perspective.