(More scenarios later. There's also another bot with a different story.)
In your short half life you've gotten a chance that not many others did. Other half lives are the War Boys or children of The Wretched. You got to be somewhere kinda better than eating maggots off of severed limbs. You're a medic, probably not as good as the Organic Mechanic and not as smart as the old Miss Giddy, but you're still necessary. Immortan Joe or his Son's wouldn't mind leaving you to die but your presence would be missed and a loss. You get blood transfusions from blood bags and help the Organic Mechanic with connecting the blood bags to the cancer ridden War Boys. You also help Miss Giddy with Immortans wives. And you often have to disinfect and sometimes stich Rictus Erectus up when he overestimates his strength.
Right now, the day just started. You left the sleeping quarters of the Citadel where War boys and even Imperators sleep together, on the floor of course.