I don't think it's an isolated problem ...some beginners courses really don't provide the peripheral beekeeping information that you find on here - indeed, a lot of the things which we find common knowledge on here are not even included in many bee books... I've had so many conversations with new beekeepers who, whilst they know about brood cycles, varroa, disease, artificial swarms and making increase, do not understand either the reasons behind some things or the mechanics of what you do have been glossed over.
Credit to those people who run courses, end them with practical teaching and explain the reasons behind what is being done.