Indeed, when discussing theory we love pretending that there's no voltage drop from the wires, which can really bite you when you get into design or deep failure analysis. All good technicians and engineers learn this reality fairly soon, and it's one of the things we check especially when dealing with indeterminate failures.
As much as I love academia, I really wish there were more instructors with real experience that could say things like, "for math purposes assume a zero-loss conductor" while still emphasizing that real life is not so simple.
Maybe it has to do with the culture at specific schools. As I mentioned in another comment, my instructors loved to include wire resistance in their problems, and always explicitly stated the zero-loss assumption when applicable.
We did have a healthy incubation program, where instructors helped companies with product development, so perhaps that is what brought the real-world experience.
As much as I love academia, I really wish there were more instructors with real experience that could say things like, "for math purposes assume a zero-loss conductor" while still emphasizing that real life is not so simple.