"pretty soon" is when? garbage trucks are giant, quarter million dollar machines with giant forks on them that could demolish thousands of homes in an accident before someone shoots its tires. this seems like one of those things that will still be done manually for years after level 5. imagine a self-operated crane constructing a skyscraper. it's not that it's inherently more difficult than self-driving--the stakes are too high and one disaster could undo decades of savings from not hiring people.