This illustrates what I call the "candy dish concept."

"Johnny, don't you climb that bookshelf to get that candy dish. YOU KNOW you're not supposed to have candy. It'll rot your teeth out."

What the parent does not realize is that little Johnny has been CHALLENGED. Suddenly, what the Mom deemed "unobtanium" is verrry eenteresting! So Johnny waits for a minute or two and then climbs the bookshelf... [CRASH!!!]

[Mom screams in horror]

[Dad:] "HONEY, CALL 911! I'll try to get this thing off of him!"

Instead of removing the temptation altogether, Johnny's Mom failed to explain the laws of physics to her kid, and her husband failed to attach the bookcase to the wall to prevent such accidents, and both of them failed to understand that kids have to know WHY they should avoid climbing bookcases or touching hot stoves or whatever else it is that they've been told not to do.

ADULTS behave this way, too! As a corporate trainer, I always took time to explain the WHY. Without it, people often have zero incentive to do as they are told. They take shortcuts and leave steps out of a process. Or they find a different way to do something that results in problems downstream in the workflow.

Without a benefit, a feature is useless.