It is true that most people who are honest would learn the first time out of embarrassment if nothing else. However a lot of people were merely indoctrinated and not educated. Many having never even gotten a whiff of what education is let alone enough to know for themselves if they like it or not. Such people would most likely make more mistakes, but will with gentle reminders learn in the end.
"for the posters own protection it is important to learn"
This comment is painfully true and even more so for steemit as a whole. I think however that the main solution is education which is its own carrot.