Or maybe it was lost so we should turn to Him and ask for His help.
The Gemara says about several righteous women that they were originally barren so that they would pray to Hashem. Obviously, children are far more important than a button!! But the same theory could apply on a smaller scale.
He wants us to pray to Him, to realize we are completely dependent on Him. For our lives, our income, our homes, our food, our clothing -- yes, down to the smallest button!