food, drink and sleep

Last night, I was sitting in a fifteen-passenger van with ten other people. I sat there for a long time--or at least, it seemed like a long time to me. Maybe seven hours, compared to eternity, isn't much of anything. But to the mind of a simple human being like me, seven hours is a very long time.
My eyes are still bloodshot from the abundant lack of sleep I got last night. I want to sleep, but those ten other people happen to be my family, and they refuse to be silent long enough for me to sleep.
All this has caused me to think of a question: what is sleep for? Who decided that we have to sleep every twelve hours just to survive? Isn't that a little inefficient?
If I were to create an entire universe and populate it with small people designed in my image, in the way that God did (Genesis 1:26), I wouldn't have given them such a huge disadvantage as sleep.
Just look around, and it's easy to see hundreds of little "flaws" in our design. To keep on going, we have to eat, drink, sleep and stay warm and dry. Our bodies can't go below a certain temperature or we slow down and ultimately die, and above a certain temperature we overheat. Again, this can lead to death. God doesn't have any of these problems--why did he give them to us?
Could it be that He wants us to rely on Him? We already know this to be true. Look at Matthew 6:25-34. We shouldn't be worried about food, clothing or shelter. We shouldn't even be worried about our own lives. God wants us to rely on Him, and Him alone.
That brings up another question. Why? Why would He want to care for a big bunch of primates with bad breath and overly fancy cars?
This is a good question (I think), and I'm out of time to write. So next time I post, if it be tomorrow or in seventy-three years, I'll attempt to satisfactorily answer that question.
Goodbye, valiant reader
Mitchell