@Dutchess_III Actually, electrician can be shadowed. Most trades can be; plumber, electrician, machinist, construction, etcetera. However, there are certain tasks you won’t be allowed to do, as merely shadowing will only teach you the very basics, not the skills required to safely handle dangerous tasks. For an electrician, that would be stuff like working on an energized panel; it’s easy to just run a cable to a dead box, but dealing with a live wire without shocking yourself requires a bit more skill.
As for those that can’t be, most jobs that rely on knowledge rather than visible action cannot be shadowed. Lawyer, accountant, doctor, most IT jobs…. anything administrative or scientific.
Take my job (CNC machinist) for instance. Many parts of my job can be shadowed. I may need to tutor you a little as to exactly how to do some things, but a lot of it is fairly simple. However, there are other parts that really cannot be learned without some more in-depth training than just watching. Try probing the solid jaws to figure out the Y offset for G512 and you will quickly enter the realm of “cannot be shadowed”. I’d wager $20 that you wouldn’t even be able to change tools in my machine (not that a mere job shadower would be trusted to operate a multi-million-dollar piece of equipment).