When you know how rockets and jet engines work, because someone explained it to you but nobody explained how car works, people might just apply that knowledge to cars.

People expect that others are born with knowledge or that it magically appears in their brains. Its not that op is retarded, its his parents that forgot to teach his son some basic stuff. When I see memes with how bad the current generation is, they forget its not the fault of the generation, its the fault of the parents. When they don't teach their children that, how should they do it?