While I chuckle reading your explanation I think you forgot to consider how much nursing is deeply ingrained in our nature by us being mammals.
> in a state of nature, they're likely to die anyways.
So while this part, where they would die if left alone, is certainly right, it would make the whole concept of us humans not laying eggs, putting some semen and mud on them and disappear into the wilderness an evolutional waste of time.
Plus, I have some acquaintances whom I suspect would very much prefer to go about their business that exact same way. So it's not a demand side problem either.
So while this part, where they would die if left alone, is certainly right
Where did I say that the babies would be left alone and abandoned? Apparently you are unaware that in human communities with low technology, infant mortality can be pretty high alarmingly. You're also apparently stating that parents looking after children is not a "state of nature." (Or you're ascribing that to me, which, given you're alone in this, indicates you need to work on reading comprehension.)
> make the whole concept of us humans not laying eggs, putting some semen and mud on them and disappear into the wilderness an evolutional waste of time.
> putting some semen and mud on them and disappear into the wilderness
> in a state of nature, they're likely to die anyways.
So while this part, where they would die if left alone, is certainly right, it would make the whole concept of us humans not laying eggs, putting some semen and mud on them and disappear into the wilderness an evolutional waste of time.
Plus, I have some acquaintances whom I suspect would very much prefer to go about their business that exact same way. So it's not a demand side problem either.