The people qualified to do great work probably don't need the advice. They most likely lack resources (like money or free time), not guidance.
The people who would benefit from the advice (resourceful people full of free time that are doing nothing meaningful) will likely ignore it anyway.
You assume that people are rigid in their habits. Inspiration goes a long way. Habits can be shaped greatly with the right motivation and mentorship.
this is one of the common conundrums of life. but for someone living in the grey, this stuff might push them over the edge to be great. that is the point of this article