Perhaps because what you describe is not autonomous driving, but human driving. And it's been through a 100 year trial and found to kill over a million people

Perhaps because what you describe is not autonomous driving, but human driving. And it's been through a 100 year trial and found to kill over a million people worldwide each year, prevent the elderly and disabled from living full independent lives, and be a huge time and money sink that many humans have to accept. Snow, heavy rain, being able to go everywhere with up-to-date maps -- these are problems which will find solutions in time. I have no doubt that up-to-date maps will be no problem, considering these vehicles constantly collect centimeter-accurate 3D maps of where they drive and upload them to Google. And being able to pull over to the side of the road to pick someone up? A simple software feature. There's nothing preventing that NOW. Don't get caught up in thinking that these things have to be perfect upon release to have a huge benefit.