Sure, it’s possible to use a CNC router to mill out a PCB, and ditto for a fiber laser. But neither tool is perfect; the router creates a lot of dust and the fiberglass eats a lot of tools ...

Because CNC routers aren't a cheat code ... that's not something I use it for often. I do like to make signs and plaques, though, the CNC is terrific for that. And while I can do inlay work ...