You forget that Google has driven almost every road on the planet for exactly this reason. They have collected much more data than just those images you see on

You forget that Google has driven almost every road on the planet for exactly this reason. They have collected much more data than just those images you see on the street view app, and it's not just "mapping data". The street view images are merely a by-product. Basically Google has recorded all the driver's reactions to whatever is happening on the road, and this allows them to teach the bot to drive. Using this data the bot can virtually drive the roads again and again, until it doesn't make mistakes. There's no way car companies can compete with them.