Because most of the people are to lazy to put there finger so high on the keyboard. Further on I know out of my own experience that most of the available help's aren't that good. And what happens with this forum if everybody uses the 'Help'? We wouldn't have nothing left to chit chat about so ... cool down dude and just help the ones who need your help. As a teacher you can give the answer and where to find it in the help so next time the one who post a question, can find the answer using his own knowledge base.
Btw, maybe you can start a forum thread with as subject: How to use the Help

Good luck!