It is important for you to understand what 'shido-geiko' means.
You are not teaching.
It is not really about you helping others.
The onus is upon how showing others affects you and your understanding.
The benefit to others is a by-product, not the point itself.
Shido-geiko is an essential learning tool.
If you dismiss it, there will be a gaping hole in your tai chi chuan comprehension.