You are at a very large building with lots of entrances, road construction nearby, and one way streets getting in and out, so you send the person picking you up a google maps pin with the precise location of where you want them to meet you. You explain that the meeting point you sent is at a particular entrance that will simplify their drive in and out as well as simplify the pickup, so it's important to understand that the pin is precise.
The driver insists on having the address so that they can plug it into their GPS. You tell them to just drive to the pin, but they insist on the address.
They call saying they are stuck due to a construction detour. This is the first sign they aren't using your pin.
Eventually, they arrive, but you do not see them. They keep telling you they are at the pin despite the fact that you are standing at it within 10'. When they say "at the pin" they mean "when you zoom out far enough that you can see the entire city". They are actually on the other side of the massive building, which you cannot walk across due to security checkpoints.
You start walking around the building and end up driving through a bunch of one way streets with construction detours.