What field of Electical Engineering is his degree in?

Why do people (especially electricians) assume that all electrical engineers have (or should have)the same knowledge base?

Everyone accepts the fact that medical doctors have specialties, well the same is true of all engineering fields. I would not expect an electrical engineer specializing in Electronic Circuit Design to know any thing about any systems over 5-12VDC. By the same token I would not expect a "Power Systems and Machinery" engineer to fix my computer.