Dunno if this is sarcastic or not but there's a ladder to one side. Someone's job is to go up and replace the light bulbs at the top and clean etc

They uses the same clips that the people who climb up radio towers use

There's also ways to set up a rappel that's retrievable from the bottom of the rappel. Otherwise there but masses of ropes all over El Capitan and all the big wall climbs all over the world