Thanks Bitcoin I learnt so much

I remember that in school, they once explained how inflation works:

They told us, that there are technical advancements, for example a better typewriter or computer that will be priced higher then the older one. They don't want want to lower the old prices, so the new stuff gets more expensive. However, a Baker sells the same bread. So he has to rais his prices too, if he wants to buy better machines.

So basically their argument was: Better technology makes inflation.

Now, through Bitcoin, I learned that it is not only wrong, but the other way arround. Technical advancements make stuff easier and cheaper. And I am thinking, why they wanted us to intentionally think wrongly about price developement? Not only not educating us about finance, but doing so in the wrong direction.