Earlier quoted context omitted.
Yeah, understanding the internal combustion engine should not be a prerequisite for riding a bus.
Most people have at least a vague idea of how a combustion engine works, don't they?
My point is: it should be possible to use something without fully understanding the minutiae of how it works. We call this “user interface design”.
You should be allowed to live in a house without a full understanding of the architectural details that prevent it from falling down.