You now there's a concept that certain species babies are cute so that we(animals) will take care of them. Hence monkeys, dogs, cats, people, etc... all have cute babies ( i don't actually like human babies, but lots of people do). There is a lot more to it then that, but that's the jist.

You can't release human babies anywhere without adults, up until a point we are completely worthless, we can't defend or take care of ourselves in any way.