I guess it just seems like there should be, because a baby has no way of knowing how to accept God into their life...how does that work?
I think it is a multi-faceted question, one which has to be discussed point by point and not all at once. For example, Job said that he wished he would have died in the womb, so that it would be as if he never existed. Which is a pretty deep statement. We put a lot of importance, and a lot of emotion into let's say... a three year old child. We believe that death is cruel, and that an eternity of death would be even more cruel of a loving God. Yet think about it.
A three year old child is well loved by parents and friends of parents, and is given a good live until the age of three. If the Child dies, does it really have full mental capacity to realize that it may never exist again? No it is simply like a young kitten, or a young puppy. It has
some mental capacity, but is certainly not graduate college student. It's more like a dream for youngsters really. At some point the hazy memory block is removed and they are able to readily recall memories, and functions. But before this, if the child was to die, and never see life again, is that really so bad for the child? Until a certain age, youngsters aren't even capable of even fathoming non-existence. They simply live a very good short life, and die.
A three year old that is beaten and bruised and mistreated dies. No more pain, no more agony. But, we demand that this child get a "reward" of some kind in the afterlife, something to make up for how corrupt and jacked up mankind is. And we demand this from God, who stepped back thousands of years ago and let humanity as a whole do basically whatever. So adult humans beat up human children, and if God takes the life from the child in order to spare it more pain, somehow God is unjust and a cruel monster for not giving it eternal life?
Something to consider, is that while a child may die a child, it would not be reborn as a child. New bodies are given, and I doubt it would be logical or "just" of God to keep a person who now has the full mental capacity they did not have in their physical body, in the body of a child. They would be upgraded to full thinking adults in the new kingdom, who never once even heard the name of Jesus, much less had the ability to call on the name.
So why not just kill all our children fresh out of the womb? I know a lot of people will try to refute the idea based on the "murder" technicality, but seriously think about it. If killing your child automatically grants them eternal life, what kind of a responsible parent or person would you be for letting your child have the opportunity to commit sin and lose that privilege? If your kid keeps wanting to put metal objects in an electrical socket, do you not smack their hand and educate them? Then why not ensure their eternal peace by just putting a bullet in them? Or having an abortion once it reaches a certain age in the womb?
This doctrine about age of accountability causes more problems than it solves.
Peace