Building autonomy to operate safely on highways is easier than building autonomy to operate safely in truckyards, or any complex, low-speed environment.
Precisely the inverse is true for tele-operation of vehicles. Tele-operation is easy to do in truckyards because speeds are low in truckyards. It’s rare to encounter vehicles in such environments traveling higher than five miles per hour. Meanwhile, tele-operation is comparatively tough to do on distant highways, where speeds are high.