Because what we are destined for is not what we are now.
They are very happy to be in the presence of the Lord. But, lets not argue over what you do not understand. Just the same. Because you asked? That is the answer. Babies that die go immediately to heaven. After all, God controls who lives, and dies... so, he can determine which babies this will happen to.
If you say I can't? Well? Unless you are God? It does not have to be as you claim.
If God could be known? Would you want to know him?
If god would actually be willing to answer, I do have a lot of questions to ask. God, not the bible, god would have to personally be willing to answer.
And humans are destined to die, that is the only certainty, and some people have dared to wonder if, perhaps, technology can even escape that fate we all share.
Fate other than that interferes with free will, we aren't fated to do anything, even by biblical standards.
And there is no reason for god to hide away, knowing that by doing so the majority of humanity will not believe in the "correct" way, if any.
And what would you do if YOU were left behind? That your precious god left you despite your beliefs for some trivial reason.
God doesn't care. God is a selfish entity that created an entire race for the sole purpose of worshiping him, that purposely designed us with flaws and then gets mad when those flaws cause us to do things that god doesn't like, even though it was perfectly within its power to make all people perfect. God is the sole source of sin, for god placed the tree of knowledge within reach, god allowed humans the capacity to disobey, god allowed the serpent to exist there, and failing to prevent an evil you were perfectly capable of preventing is practically as bad as committing the act yourself. God allows children to die and people to be raped. God allows people to not believe and go to hell. God could fix the broken watch that is humanity, and chooses not to, but still gets angry when it doesn't work. The only one at fault here is god, for the root of all that is wrong lies not in god's creations, the humans, or even the devil, but in god, because all flaws are put there knowingly.
Unless, of course, no god was involved at all. Then we are accountable for our actions, the deaths of many babies are tragic realities of living, the murder and rape evils within people that were always in human history.
And when you realize these flaws are by chance, you understand that they aren't stable, unchanging parts of humanity, but fixable flaws that, with enough effort, we can better ourselves as both individuals and as a society.
You're so stale. 
