Spikes, you forgot the part about the circle.
You don't actually park on the building. Next to the building, there is a yellow circle painted on the taxiway. Stop your plane in it, and you'll get a message that rearming is started. 30 seconds later, you'll get another message that loading is complete. Then you can taxi away and take-off like you are starting new.
There are a couple of benefits. If ord or fuel is down at that base, you still get the loadout you had at initial takeoff. Plus, if you're a score potato , it keeps the same sortie going so you can run your kill total for the mission higher.
It is certainly a skill you want to practice if you plan to do any scenarios or other events that are one life. You can't replane, so you have to rearm during the longer events.