Because understanding the basics of how something works is a far cry from knowing how to design the circuit boards to make it function.
Maybe you should go defend the little kid on the playground, they need protected more than most of these ideas.
I could build a computer, but I don't know how to build a hard drive.
I would say I know the basics.
Where did this schoolchild come into play?
Thank you for proving my point. I would BET you even understand the basics as to how that hard drive works, yet you can't build one.
And the school kid comes in about defending something that needs defending.
Some kids deserve a swift punch to the cheek.
The hard drive was an example of a component of the system that I wouldn't be able to build from scratch.
Looking at this analogy, I'm sure there's pieces of a satellite that the average Joe wouldn't be able to build, though if Joe had the blueprints that listed all of the components in their correct places, he might be able to pull it off. (With a bit of basic knowledge of how a satellite "works". (...Maybe slightly-above-average Joe.))
Do you see what I'm saying yet?
Perhaps we just have differing standards of the term "basic".