Sorry to burst your bubble, helping does not mean teaching. And Seva is the cornerstone of Sikhi which I happen to agree with.What's the higher purpose of living if not to help others?
Firstly, sharing is not teaching. How sharing a piece of bread or an idea can be teaching. It is sharing which Sikhi demands from us. Simply put. Please use Gurbani from the SGGS to clarify your claim because it is quite nebulous to put it opaquely.U practice it and teach others to find their way home. If He teaches u in experience, what would keep you from sharing it with humanity as Nanak did?