You just don't get it do you. I know this isn't so hard to understand.

How about I don't pratice for a year and we play "William Tell". Say 20 yards the apples on your head. How confident would you be I'd hit the apple and not you?

Think about it. Common sence (If common sence was so common everyone would have it I guess) dictates you must pratice to be lethal with a bow and arrow.