I am surprised these ships dont have cranes on them - one that collapses or withdraws, into the ship for under-passings. Also - I am surprised we dont have a d

I am surprised these ships dont have cranes on them - one that collapses or withdraws, into the ship for under-passings. Also - I am surprised we dont have a docking hub floating in the Mediterranean which super heavy's dock to it and transfer cargo to smaller units who then head to ports, with an automated unloading system.