I finally understood how a car's engine worked after building my first Visable V8 model. I remember asking my Dad how an automobile engine worked as kid. He was not expert mechanic by any means. But, he could fix most things that went wrong on our family vehicles. When I asked to explain how a cars' engine worked, he just said it was complicated. And the books I found in the school libraries didn't seem to tell it in a way that I could understand. I've always been more of a visual learner. Once I see something working I can generally grasp how it does what it's doing. I was surprised when I built my first Visable V8. My dad was wrong, four-stroke internal combustion engines are really not that complicated at all. The minor details are. But the general design and the way it works I found pretty straight forward. And that's just one of many things about cars I've learned from building models over the years.
At the same time, I too like it when the instructions label what the part. I also learned a lot of from reading model instructions of other kits.
Scott