> and all autopilot does is go in a straight line

This isn't true, and there's any number of YouTube videos demonstrating that. At the very least, it knows how to navigate highway interchanges, how to change lanes, how to avoid other cars that would otherwise collide with it, and to avoid/slow down for pedestrians and cyclists.

The last feature is perhaps overly sensitive in my personal experience. It used to slow down dramatically whenever it was passing a cyclist, that has improved in recent versions.