Harrytruman, a lot of school including mine dont have health class, I dont know if is just an Irish thing for us or not haha. You may not need help and it may seem pointless but other people do. Clearly you have not had any experience with severe mental health problems. If you look at another perspective, it may save someones life or inform them that they dont need to feel the way that they do.
No one is giving you lectures, its called informing.