If Ha-Shem wanted babies to be able to care for themselves, he would have designed things so that women would lay eggs and leave (as turtles do), and babies would be born with sufficient intelligence to carry on by themselves (just as baby turtles are born with sufficient intelligence to carry them through turtlehood).
It should be noted that many secular scientists have decided that it is a good thing for babies to be born a bit dumb since it allows time for the parents to educate them (and of course, the scientists never give Ha-Shem credit for this feature).