Why Can't We Be Like The Sparrow?

This morning I saw a mother sparrow taking care of her baby while the father watched and helped. 
The baby tried to fly on his own, landed on the swing, there were squirrels at the bird feeder and as the mother went to the bird feeder the squirrels didn’t scatter they just stopped and waited for the mother to get the seeds to take back to feed the baby sparrow, he was so excited when she came with the food, when he dropped the a seed from trying to eat the mother flew down picked it up and put it back in his mouth, he was totally dependent on his mother and the mother knew that. I think the mother sent the father a signal and they both flew away to let him fly on his own. The mother is skinny and the baby is plump because the mother has neglected to eat while feeding the baby. About after an hour I just went back to look, the baby is still on the swing, the mother and father just flew back after leaving him for an hour, I guess to see if he would fly on his own, it was funny, when he saw the mother he started shaking on the swing and the mother was on one side of him and the father on the other side of him so he wouldn’t lose his grip, he flew away with mother and father sparrow. Truly amazing about God's little creatures and how they obey God by their natural instinct.  Man’s natural instinct is to sin, why can’t we be like the sparrow and just obey God and simply look to Him for guidance, if we follow God’s lead, we will not err.