Here is something that may be hard for you to understand, Prince Albert, but God is not Superman. He is not the Great Cosmic Babysitter. He doesn't fly around saving people from disasters.
He is the first Sentient Being in the infinite universe. He was the only Sentient Being in the universe.
Out of loneliness, he created the angels. He created them whole and complete to keep Him company and love Him. Because He wanted to be truly loved, He gave them free will. Within moments, there was a battle for Surpemacy in Heaven and roughly half of them fell from grace. He gave them everything, made them perfect, and like spoiled and ungrateful children, they rebeled against Him.
So he made us.
He didn't give us perfect, immortal bodies. He didn't give us salvation. He didn't give us anything he gave the angels, except sentient minds and free will. Whether we live out our lives as animal meat or strive to become something more, something infinite, is up to us.
I think I have come to understand God a little better after becoming a father. You see, when you give your kids anything material they desire, they grow up spoiled and despise you. When you give them unconditional love and only the things that they need, they will respect you.
God gives us the knowledge to grow spiritually and supplies our needs for survival, but He is not there to save us from stubbing our toes or making mistakes. Without pain, how can we understand pleasure? Without want, how can we understand satisfaction? Finally, without death, how can we appreciate His greatest gift of all...immortality?
You say you are not immature, but your very question is a child's question.
"Daddy, why can't you fix it?"
To which, a wise father says, "If I fix everything for you, you will never know how to fix it yourself. Instead, I will show you what to do for yourself."