I learned how engines worked by taking apart, cleaning and reassembling an ancient lawnmower engine so I could use it on my go-kart. I then learned how cars worked by taking one apart and putting it back together again.
Neither of those machines had a transistor in them. It was all basic electricity.
Wait a few years and no HD will be able to do something similar.
See other story on front page right now: educational scores are trending down and that trend is only going to accelerate now that every student is using LLMs.
Try doing the same on the ECU in your car. I'll wait.