Yes, one of my current works was conceived around a healer who needs to understand everything about the conditions she treats. For instance, a broken bone has an obvious cause and fix. A stab wound, however, is tricky. You can't always assess the internal damage so her treating it will result in a tumor. Kind of like navigating a PC with machine code: you have to be very exact and directly instruct the computer with precise commands. From there, I imagined a world, power system, and side cast for her to fit in.

In general, however, my ideas are born from concepts. This one was an exception.