If the recognition algorithms for numbers and faces in StreetView are so wonderful, why are there so many randomly blurred out bushes and bus stop signs? In a t

If the recognition algorithms for numbers and faces in StreetView are so wonderful, why are there so many randomly blurred out bushes and bus stop signs? In a typical frame you can find a row of No Parking signs or parking meters and randomly one of them is blurred out, as if they thought it was a face. Machine learning has plenty of learning left to do.