Difference between systematic and one-off
Google are publishing a huge number of images in one place, indexed by location. That's a bit different from publishing just a few images, however big and detailed they are. For comparison, newspapers and magazines don't systematically blur faces and numberplates when they publish a photograph of a crowd or street scene.
Incidentally, a while ago the TV happened to be on showing one of those crime/accident reality-type programmes and I noticed that the camera lingered over the numberplate of a red Ford that had been involved in a crime/accident. I happened to have a browser open so I typed the number into some second-hand/car insurance web site, and the correct description was displayed. Strange. Not being bothered to blur out the number I can understand, but in this case there was really no need, that I could see, for including the close-up shot of the numberplate.